We're using an arbitrary standard of 150 at-bats and 50 IP to determine rate leaders.
Byron Buxton, .927
Eddie Rosario, .881
Jorge Polanco, .793
Kennys Vargas, .361
Daniel Palka, .483
Adam Brett Walker II, 27
Wilfredo Tovar, 24
Walker II, 22
Walker II, 75
Tommy Field, 44
Darin Mastroianni, 8
Walker II, 7
Jose Berrios, 2.51
Nick Greenwood, 2.84
Logan Darnell, 3.53
Jason Wheeler, 3.53
Andrew Albers, 10
Alex Wimmers, 11
J. T. Chargois, 9
Marcus Walden, 7
Ryan O'Rourke, 33
Mitch Garver did very well in his short time in Rochester, hitting .329/.381/.434 in 76 at-bats. The Twins say his defense behind the plate improved quite a bit, too.
The Twins dropped John Hicks to make room for David Murphy, who didn't want to play for them. Hicks went on to bat .296/.346/.474 in AAA.
I'm happy that James Beresford got a September callup. But in three and a half AAA seasons he's hit .286/.334/.342. He's twenty-seven. It's quite possible that this September callup will be his entire big-league career.
As Wilfredo Tovar's name popped up in a couple lists, I thought you might want to know about him. He's twenty-five. He played in nine games for the Mets from 2013-14. He hit .249/.301/.327. He's stolen fifty-nine bases over his last two AAA seasons. In the old days, when teams only carried eight or nine pitchers, he might've had a decent career as a pinch runner/utility infielder. Now, though, I don't see much future for him.
What about Adam Brett Walker II? Well, he hit .243/.305/.479. He also struck out 202 times in 478 at-bats. That's a strikeout average of .423. I can't see him getting much of a chance with anybody unless he can cut down on the strikeouts. Unfortunately, he's going the other way: he had 156 strikeouts in 505 at-bats in Class A in 2014 and 195 strikeouts in 502 at-bats in AA last year. He'll turn twenty-five next month.
Kennys Vargas and Byungho Park both had low averages with power. Vargas was .233/.361/.424 with 15 homers. Park was .224/.297/.526 with 10 homers.
Daniel Palka's numbers went down significantly when he made the jump from AA to AAA, but he continued to hit with power, too. .232/.296/.483 with 13 homers.
Jason Wheeler turned in a fine season, going 11-6, 3.53, 1.20 WHIP. He'll turn 26 next month.
Nick Greenwood pretty quietly had a fine season. He went 6-3, 2.84, 1.10 WHIP in 79.1 innings after getting called up from AA. Unfortunately, he'll be twenty-nine at the end of the month. Still, there are pitchers who figure it out late, and with that kind of record there's a pretty good chance he'll be pitching somewhere next season.
D. J. Baxendale and J. T. Chargois had remarkably similar seasons. They were both 2-1, 1.29. Chargois had a WHIP of 1.00 and Baxendale was 1.03. Chargois struck out 41 and Baxendale 40. They each pitched 35 innings in AAA. They'll also each turn twenty-six in December.