The Pirates acquired Corey Wimberly from the A's, according to MLB.com's Jenifer Langosch (on Twitter). The A's acquire right-hander Ryan Kelly in the deal, according to MLB.com's Jane Lee.
Wimberly has not appeared in the majors, but he turned in a productive season as a utility player for the A's at Triple-A in 2010. The 27-year-old posted a .284/.373/.354 line with 56 steals while playing at least ten games at short, second, third, left and center.
Kelly, a 23-year-old reliever, posted a 4.20 ERA with 9.0 K/9 and 1.7 BB/9 in 75 innings at A ball last year. It was his second season in the South Atlantic League and his fourth as a pro, so his ascension through the minors has been unhurried.