Austin Jackson - Jackson may be the best prospect the Yankees have traded in a while. Although he's come back down to earth since his early-season breakout, he's still hitting .308/.352/.412 with a .347 wOBA and 10 steals. His .418 BABIP suggests that average could continue to come down (and his past month has been pretty atrocious at the bat), but even if he does, Jackson is backing it up with Gold Glove defense. His catch in the 9th inning of the Armando Gallaraga near-perfect game stands out, but John Dewan just came out with his top defenders in 2010 and it shows that Austin Jackson has been the best defensive outfielder in baseball*. The Yankees have had the benefit of not regretting many trades in the past 15 years but this one may turn out to be on they regret. Definitely miss. Picture from MLive.com
*Side Note: A lot of us have seen an improved defensive effort from Robinson Cano, but his inclusion on this list (#8 in all of baseball) shows that his defense has actually been excellent so far in 2010.
Ian Kennedy - IPK is one of those classics of "would he actually have succeeded pitching in the AL East?" I don't think so. But Kennedy has come back from aneurysm surgery and has proven to be a valuable addition to the Diamondbacks team. His 14 game started is tops in the majors and although he's 3-4, he's put up a 3.57 ERA and a solid 2.48 SO:BB ratio. ESPN's Buster Olney wrote this morning that other than Justin Upton, Kennedy is the only untouchable player on the Diamondbacks team. That's pretty lofty status. Alas, some of the stats may be inflated by good luck and an unattainable pace. Kennedy is on pace to throw 219 innings after never throwing more than 39.2 innings in the Majors before and only reaching his previous high of 165 in 2007 (combined between every single level of baseball). The larger problem is that Kennedy's FIP (4.78), xFIP (4.28) and unusually low BABIP (.259) suggests that there is a correction in ERA coming at some point as well. And in his one American League start (against Boston yesterday) Kennedy got charged with 6 runs in 6 innings. Miss only because of lack of depth. Picture from AZCentral
Phil Coke - The third part of the Granderson deal, Coke has enjoyed a good deal of success in the Tigers bullpen. He's 4-0 so far on the season with a 3.18 ERA and turned around his home run issue from last season (he gave up 10 last year, 1 so far this year). Coke's FIP (3.41) seems to make it possible that his ERA could continue at this point, but when you factor in the home run decrease, his xFIP of 4.15 puts him more in line with last year's ERA. Even if his ERA jumps up a bit, Coke has still been a valuable piece to the Tigers bullpen and a missing piece for the Yankees. Miss in the 'pen.