Wells was 0-4 this year over five starts with a 6.08 ERA. He made 12 appearances for the Cubs last year with a 5.34 ERA. Wells finishes his career with a 4.08 ERA. He won a career-high 12 games in 2009 for the Cubs. 

Grimm, 24, posted a 9.64 ERA and allowed 15 hits and six walks in 9.1 spring innings. Wells, 30, allowed 17 hits (including three home runs) and six walks in 13 innings in 13 spring innings. These moves and the shift of Robbie Ross to the bullpen leaves Nick Tepesch as the last man standing in the Rangers' fifth starter competition.

"We don't want walks, but if you put yourself in trouble, you make pitches to get out of it, so then it's no big deal," manager Ron Washington told ESPN.com. "You don't always want to be walking guys like that though because you aren't always going to be able to pitch around it." 

Wells also struck out four batters, raising his total for the spring to 10 in 13 innings. He now has a 4.15 ERA in four appearances, with six walks, 11 hits and three home runs allowed. Wells likely kept himself in reach of the fifth starter spot, a role for which he is battling with three other pitchers.