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The what and why can be found here, but my efficiency stats, in a nutshell, try to value each players' contributions (points, rebounds, assists, etc.) and efficiency (how many missed shots, turnovers, etc.). I calculate both per-game and per-possession rankings by taking the box scores from Big Ten teams' regular-season conference games and running them through my player efficiency ratings to determine the individual worth of 127 players. For the findings below, I trimmed anyone who played less than 9.5 possessions per game (like say, Hanner Mosquera-Perea or Amadeo Della Valle) to eliminate outliers. So that has cut the number of players listed below down to a "tidy" 109. The full worksheet can be found here.
Terminology
IPSPG = individual possessions per game, or how many possessions (on worksheet) EPtotal= the total Effective Production of the player to date (on worksheet) EPPG= Effective Production Per Game EPPS= Effective Production Per poSsesion
For reference:
Mean EPPG: 10.6Median EPPG: 10.5
Mean EPPS: 0.2979
Median EPPG: 0.2919
(So, essentially, if a particular player is at or above 10.5 EPPG and .2900 EPPS, they're doing pretty well. If they are below that mark, not so much, but keep in mind that outside shooters tend to get lower rankings and bench bigs tend to get higher rankings. This is why I compare and rank starters by position across the conference. It's also important to recognize that generally, the more a player is asked to do per-game, the more difficult it is to post an improved per-possession mark).
Illinois
Egwu, Nnanna 13.0 / 0.3229 9C
Abrams, Tracy 13.9 / 0.3019 5PG
Paul, Brandon 14.3 / 0.2903 7SF
Griffey,Tyler 8.0 / 0.2742
Bertrand, Joseph 10.3 / 0.2648
McLaurin, Sam 8.6 / 0.2509 10PF
Henry, Myke 4.4 / 0.2469
Richardson, DJ 11.7 / 0.2103 11SG
Personnel notes: After a brief mid-conference bounce, DJ Richardson's numbers crashed again, aligning closely with his career marks. DJR hit some big shots against Indiana, and his shooting percentages actually were higher in conference play than overall! Still, like Paul, he didn't shoot well overall, had more turnovers than assists, and (unlike Paul) was the worst rotation player at getting rebounds. He and Paul really never lived up to earlier flashes of their potential. The fact that Groce got these guys to the NCAA tourney, and pretty close to the sweet 16, speaks volumes about either his coaching ability or plain ol' good luck. Seriously, it would be hard to find another coach in the world who could've gotten two more conference wins out of the talent on hand. There's a ton of turnover, but Groce's most improved, and most efficient, two players are back next season (although Egwu really needs to hit the defensive glass: 43rd overall in conference def. reb. % is not great for a starting center). But it'll help Egwu and Abrams a lot if Bertrand is able to get healthy.
Indiana
Oladipo, Victor 26.5 / 0.5372 1SF
Zeller, Cody 25.6 / 0.5096 2C
Sheehey, Will 11.9 / 0.3364
Hollowell, Jeremy 4.1 / 0.3109
Watford, Christian 14.7 / 0.3103 8PF
Ferrell, Yogi 13.5 / 0.2829 7PG
Hulls, Jordan 12.4 / 0.2509 7SG
Elston, Derek 2.2 / 0.2174
Abell, Remy 2.4 / 0.1516
Creek, Maurice 1.4 / 0.1486
Personnel notes: The most efficient player in the conference, per-possesion? Victor Oladipo. The third-best was Cody Zeller, and although he finished just behind Trevor Mbakwe, he broke the .5000 mark per-possession. I know a lot of us looked at Cody's game with critical eyes, but that mark has only been broken 14 times in the 7 years I've been running these numbers, and by only 8 other starters (Draymond Green, Jordan Taylor, Rob Hummel, Evan Turner, Greg Oden and Mike Conley Jr. from past years). DJ White never produced like Zeller did this year. There's decent news for next year here, as Jeremy Hollowell looked pretty good per-possession (almost identical to Christian Watford) even with a bit of a drop late in conference play. Will Sheehey had a big jump in his ratings, and looks to be an impact starter next season. Hanner Mosquera-Perea didn't play enough minutes to qualify, but his rating per-possession rating only slightly improved to 0.1982, which was a bit disappointing. Still, that performance mirrored Gabe Olaseni's efficiency from last season, and Olaseni turned out to be a decent bench option for the Hawkeyes this year. Also, Yogi Ferrell's marks don't look fantastic, but freshmen points always struggle. Historically, his numbers are a little behind notable rookie points Kalin Lucas and Lewis Jackson, and decently ahead of Tim Frazier and Darius Morris. Like all of those players, I expect fairly big improvements from Ferrell next season, which will be needed with most of the roster turning over.
Iowa
White, Aaron 20.4 / 0.4256 3PF
Basabe, Melsahn 13.3 / 0.4212
McCabe, Zach 10.4 / 0.3944
May, Eric 13.7 / 0.3874
Woodbury, Adam 8.1 / 0.3361 8C
Olaseni, Gabe 5.6 / 0.3247
Marble, Devyn 17.1 / 0.3226 1SG
Clemmons, Anthony 8.6 / 0.3105
Gesell, Mike 11.9 / 0.2564 11PG
Oglesby, Josh 4.6 / 0.1705
Personnel Notes: Even though Marble's efficiency doesn't look impressive here, he was by far the best option at off-guard for the Hawkeyes (and yes, by these ratings, in the conference), and really bounced back after a midseason injury. Anthony Clemmons' ratings took a steep nosedive in the second half of conference play, to a point that I can see why Marble is being floated as a possible point guard for next season. Eric May really finished out his senior year well, but I want to note that we shouldn't let Woodbury's relatively low rating deceive you. He seemed to get it all figured out in NIT play, and would be a good bet to be a much-improved sophomore. How on earth did Zach McCabe score so well? His rebounding was very good (just behind centers Berggren and Nix), and posted an incredible 3.03 steal percentage - good for 8th in the conference! If he can move back to small forward, there might be a starting spot open for him next season. Big if, though.
Michigan
McGary, Mitch 13.9 / 0.4359 4C
Burke, Trey 26.6 / 0.4606 1PG
Morgan, Jordan 10.0 / 0.3681
Horford, Jon 4.9 / 0.3375
Robinson III, Glenn 17.2 / 0.3153 7PF
Biefeldt, Max 2.9 / .3059
Hardaway Jr, Tim 15.1 / 0.2732 10SF
Albrecht, Spike 2.6 / 0.2352
Stauskas, Nik 11.2 / 0.2279 10SG
Levert, Caris 2.6 / 0.1487
Personnel notes: Trey Burke had a rough second-half of the conference season, as most opponents followed IU's lead to make him beat you shooting and not penetrating and passing, which worked well enough. Burke still produced more per-game than anyone else in the conference, and was pretty clearly a great choice of B1G MVP. Mitch McGary looks like a legit threat for conference POY next season, as he seemed to figure out in the NCAA tourney how to lend production to the Wolverines while also being a part of the team defense. Although Robinson and Stauskas' marks were mediocre at best, they really produced for freshmen. And among non-center freshmen, only Sam Dekker and Denzel Valentine had better marks than Robinson did. Robinson shot very well, but also hit the offensive glass and didn't turn the ball over much at all. When he becomes more featured next season, we'll see if that assist/turnover ratio stays as positive.
Michigan State
Payne, Adriean 19.8 / 0.4491 1PF
Dawson, Branden 16.2 / 0.3838 3SF
Nix, Derrick 10.8 / 0.3612 7C
Valentine, Denzel 10.8 / 0.3358
Appling, Keith 17.5 / 0.3274 4PG
Harris, Gary 16.0/ 0.3152 2G
Trice, Travis 7.5 / 0.2476
Gauna, Alex 2.1 / 0.2067
Personnel notes: The news here is almost all great for coach for coach Tom Izzo. Nearly everyone ended the season on an upswing, efficiency-wise, and Payne and Harris have positioned themselves for contention for conference POY in 2014. However, the two players who did see fall-offs were Keith Appling and Branden Dawson. Appling seemed like, at least late in the season, that he needed to do a better job of picking his spots of when to try to take the game over. Maybe as a senior he'll be able to do that better. Dawson, I'm not sure about. He's talented, but does not seem particularly mature, head-wise. Izzo is going to need him to able to play the four-spot again, which is where he seemed to do a little better early in the year. Russell Byrd didn't play enough to get rated here, which is good, because he was actually regressed from last year's terrible rating. Byrd's specialty was supposed to be three-point shooting, and actually hoisted 41 attempts in conference play. He hit 7 (17.1%). Not promising.
Minnesota
Mbakwe, Trevor 23.2 / 0.5204 1C
Elliason, Elliot 8.9 / 0.4582
Hollins, Andre 17.5 / 0.3801 3PG
Williams, Rodney 14.9 / 0.3535 5PF
Osenieks, Oto 4.3 / 0.3457
Hollins, Austin 13.1 / 0.2833 8SF
Welch, Julian 4.8 / 0.2649
Coleman, Joe 9.9 / 0.2469 8SG
Ingram, Andre 3.6 / 0.2455
Ahanmisi, Maverick 3.5 / 0.2375
Personnel notes: There were a lot of big drops in the second half of conference play for the Gophers. Joe Coleman, Austin Hollins and Oto Osenieks all had notable tankings in their production and efficiencies, as Minny went from a conference contender to a bubble team. At least Rodney Williams was injured, but his numbers barely changed. Quick aside about Mbakwe: the guy was clearly a power forward, but played most of his minutes at center for the Gophers. Mbakwe's per-possession mark was only second to Oladipo's, and he was clearly one of the five best players in the conference. The bench got a lot of grief from Minnesota fans, but they don't look particularly inefficient from a per-possession view. It's true that they weren't very productive, but I think that had more to do with their limited minutes. Looking at the ratings, maybe Coleman took off because the Hollins were going to take his minutes on the wing next season? New coach Richard Pitino is pretty high on new Juco point Dre Matthieu. In good news, Elliason posted a good mark off the bench, and I think Andre Hollins' placement as the #3 point guard (just a hair behind Aaron Craft) was pretty impressive.
Nebraska
Almedia, Andre 6.1 / 0.3177
Ubel, Brandon 14.4 / 0.3156 10C
Tyrance, Jordan 3.3 / 0.2971
Shields, Shavon 13.2 / 0.2796 9SF
Talley, Dylan 14.8 / 0.2731 9PG
Rivers, David 9.8 / 0.2214 12PF
Gallegos, Ray 11.7 / 0.2001 10SG
Parker, Benny 3.8 / 0.1456
Personnel notes: There's not a lot of individual performances that's eye-opening. I think Shavon Shields has some serious potential, and he produced pretty well in his first season. Ray Gallegos got some headlines for his shooting outbursts, but he was a high-volume guy who didn't add much unless he was hitting threes. Dylan Talley managed okay when pressed into action at point when freshman Benny Parker wasn't up to the task, but he graduates. Parker did post a positive assist/turnover ratio, but just wasn't able to hit shots. Even though they're at the top of Nebraska's efficiency ratings, Ubel and Almedia were just mediocre (at best) for Big Ten centers, and both are gone for next season. The play in the paint will be at least as big of a concern next season, as only Shavon Shields has demonstrated an ability to hit the defensive glass.
NorthwesternSwopshire, Jared 21.9 / 0.4331 2PF
Sobolewski, David 18.8 / 0.3449 6PG
Turner, Mike 7.6 / 0.3159
Marcotullio, Alex 9.9 / 0.2919 3SG
Olah, Alex 8.6 / 0.2643 11C
Hearn, Reggie 12.5 / 0.2499 12SF
Demps, Tre 7.9 / 0.2293
Abrahamson, Kale 6.3 / 0.2181
Personnel notes: Reggie Hearn was never the same after his injury. He had some good moments, but his efficiency and production fell off a cliff in conference play. David Sobolewski and Alex Marcotullio actually managed pretty decent performances, but when Swopshire went out for the season, they had no support. Swopshire was playing the 18th-highest amount of possessions in the conference, which is even more impressive given NU's slow pace and his work in the paint. Frosh Michael Turner ended up with some pretty decent numbers, if you didn't actually watch him play. Sure, the kid can pass, but his overall defense really needs some shoring up, as he was the only non-starter in the conference's top 10 leaders in DQ's from fouls. I do think Turner could be a decent role-player off the bench, but don't expect him to be able to start next season, which leaves Collins starting.... Abrahamson at the four? Yikes. Well, Kale was slightly better than Mike Turner on the defensive glass, although they were both in the same general neighborhood as Marcotullio.
Ohio State
Scott, Shannon 13.7 / 0.4398
Craft, Aaron 20.9 / 0.3821 2PG
Thomas, Deshaun 21.3 / 0.3731 4PF
Williams, Amir 9.8 / 0.3613 6C
Ravenel, Evan 8.9 / 0.3369
Smith Jr, Lenzelle 11.8 / 0.2695 5SG
Thompson, Sam 10.3 / 0.2684 11SF
Ross, LaQuinton 4.2 / 0.1873
McDonald, Trey 1.7 / 0.1504
Personnel notes: I'm still shocked Shannon Scott's position near the top of the conference leaders in efficiency. The kid is capable off the bench, and a thief beyond belief, but just looks like a bit of a liability on offense. He gets quite a few assists, but often seems like Daniel Moore did - just a turnover waiting to happen. I've said elsewhere, but I'll say it more definitively here, Aaron Craft was OSU's most valuable player. When he attacked the defense, OSU's offense just flowed. When he was passive, it was all on DeShaun Thomas to make something happen. I did notice Sam Thompson's effiency moving up late in the season, and he looked pretty decent in the NCAA tourney, but his marks were still less than mediocre overall in-conference. I don't think Matta can shift him to the four-spot, and I also think Ross needs to keep coming off the bench until he shows he can do something besides be a streak shooter with a truly wretched assist/turnover ratio.
Penn State
Marshall, Jermaine 18.1 / 0.3291 4SF
Newbill, DJ 17.6 / 0.2998 6PG
Borovnjak, Sasha 10.5 / 0.2613 12C
Graham, Jon 4.5 / 0.2484
Travis, Ross 12.2 / 0.2455 11PF
Colella, Nick 8.1 / 0.1797 12SG
Taylor, Brandon 3.9 / 0.1269
Jack, Donovan 0.1 /0.0113
Personnel notes: Jermaine Marshall and DJ Newbill actually looked pretty decent by the end of the year. If Chambers would be able to shift Newbill to off-guard, his natural position, his efficiency rating would sit only behind Devyn Marble and Gary Harris. PSU looks like it is primed to make a move, but the depth was pretty terrible this season, and the interior play looks unlikely to make any sort of improvement next year. Sasa Borovnjak improved during conference play, but he was still the worst center, and will be spending his final year of eligibility as a grad student somewhere else. I can't believe Marshall left, too. He looked like he finally had figured out how to be aggressive on offense at the end of the season. I don't know how much of a difference a healthy Tim Frazier will make next season, but there's really nowhere to go but up.
Purdue
Hammons, AJ 18.9 / 0.4793 3C
Marcius, Sandi 6.2 / 0.4606
Byrd, DJ 15.4 / 0.3061 9PF
Davis, Raphael 10.5 / 0.2926 8SF
Johnson, Terone 14.8 / 0.2849 4 SG
Johnson, Ronnie 14.5 / 0.2758 8 PG
Carroll, Travis 3.1 / 0.2739
Hale, Donnie 6.2 / 0.2351
Lawson, Jacob 2.6 / 0.2031
Johnson, Anthony 4.5 / 0.1809
Anthrop, Dru 1.6 / 0.1386
Personnel notes: Mostly, the Boilers ended the season on an upswing in their individual performances, which was also reflected in their team success. Next year looks great given the number of freshmen in the rotation, but only AJ Hammons is coming back with a really good individual rating. On the other hand, the Johnson & Johnson backcourt looks like one of the better pairings in the conference, even if they're not super-great shooters and turn the ball over a little too much, they just add so much else. Rapheal Davis looks pretty well positioned for improvement as well, as long as he improves that outside shot over the summer. Power forward is a bit of a concern, at least offensively, as Donnie Hale's rating landed in between Ross Travis of PSU and David Rivers of Nebraska. Not exactly heartening for a guy who's already had couple of years to develop. Hammons has shown he can already block shots and get defensive rebounds, so as long as his consistency comes along next season, the paint shouldn't be too worrisome.
Wisconsin
Kaminsky, Frank 5.5 / 0.4236
Berggren, Jared 19.0 / 0.4123 5C
Dekker, Sam 12.9 / 0.3866
Evans, Ryan 15.0 / 0.3525 6PF
Bruesewitz, Mike 14.1 / 0.3118 5SF
Brust, Ben 14.1 / 0.2626 6SG
Jackson, Traevon 10.8 / 0.2389 12PG
Marshall,George 3.1 / 0.1464
Personnel notes: Sam Dekker certainly ended the season well. He ended with the third-highest efficiency mark for a freshman, and the 18th highest in the entire conference. He shot 50% overall, 42% from three, and 78% from free, and posted a positive assist/turnover ratio. It's no stretch to suggest that he'll be contending for a first team all-conference spot next year. Kaminsky and Brusewitz's numbers came down a bit, but Kaminsky is still looks good for starting center next season (even if his three-point stroke isn't quite as good as the typical Wisky center). Traevon Jackson's numbers took a considerable jump in the second half of the season, and the fact that he was still ended up as the lowest rated point guard should tell you just how bad his numbers were. The Badgers need Gasser back at full strength next season.