Wimberly is a 27 y/o switch hitter who in seven minor league seasons carries a .297 BA and in 2010 with the Oakland affliate stole 56 bases. In 2009 he lost part of the season due to a hand injury and last year only played 56 games as he was slowed by injuries. He had a chance to make the Pirates out of spring training but botched his chances at SS, he's played 2B/SS/3B/CF and LF. By the way he is on twitter here.
The Pirates acquired Wimberly from Oakland for RHP Ryan Kelly. Wimberly is a poor man’s Chone Figgins: a small (he may be as little as 5’6″), very fast player who gets on base, steals bases, has no power at all, and plays a number of positions. Primarily a secondbaseman initially, he’s seen significant time at short, third, center and left in recent years. Regretful at having traded Figgins away, the Rockies started grooming Wimberly for a super-utility role in 2008. He has good range defensively and an adequate arm, but his fielding and throwing haven’t been consistent. At the plate, he’s strictly a slap hitter and will frequently try to beat out bunts. source Pirates Prospects
Jeff Stevens was traded from the Reds to the Indians in the Brandon Phillips deal and then from the Indians to the Cubs in the Mark DeRosa deal. Since the trade Stevens has come up briefly for the Cubs over the last three seasons, all as a reliever. In 33 appearances he has a 6.27 ERA/ 1.71 WHIP, in four AAA seasons he has a 3.93 ERA and struck out 163 in 153 innings.