Gentry, 30, is the big name here. He hit .280/.373/.386 with 24 stolen bases last season in 287 plate appearances. He's a career .280/.355/.366 hitter over the course of five seasons and 763 plate appearances. He's stolen 56 bases in 66 tries in his career.
Also of note: Gentry is an outstanding defender with great range. He'll serve as an asset to the A's with his high on-base ability and in terms of covering a lot of ground in the spacious outfield at O.co Coliseum.
Lindblom, a 26-year-old right-hander, has thrown for the Dodgers, Phillies and Rangers in the past three seasons. In his carer, he has a 3.82 ERA, 1.31 WHIP and 119 strikeouts in 132 innings. He's started five games and appeared in relief 104 times.
Choice, 24, hit .278/.316/.333 with a double in 19 plate appearances last season. It was the first foray into the majors for the once-touted prospect (he was ranked at the 80th best prospect by Baseball America prior to the 2012 season before falling out of the rankings the next year). He hit .302/.390/.445 with 29 doubles and 14 homers in 132 games for Triple-A Sacramento last season.
Bostick, 20, hit .282/.354/.452 with 25 doubles, eight triples, 14 homers and 25 steals for Class-A Beloit last season. He's played mostly second base but also a bit of shortstop in his professional career.