"Baltimore's Buck Showalter and Vladimir Guerrero return to Rangers Ballpark in Arlington tonight.

This will be Showalter's first appearance in his former home park as the Orioles' manager. Showalter was 319-329 as the Rangers' manager 2003-06. The Orioles are 12-21 since May 27.

Guerrero remains in the power slump that started after the All-Star break with the Rangers last season. Guerrero is hitting .277 with six homers, 28 RBIs and a .377 slugging percentage. With the Rangers last season, Guerrero hit .310 with 20 homers, 75 RBIs and a .554 slugging percentage before the break and .278 with nine homers, 40 RBIs and a .426 slugging percentage after the break."