The Diamondbacks returned pitcher Marcos Mateo to the Cubs Thursday.
Arizona had selected Mateo in the Rule 5 draft in December.
Mateo — who turns 30 in April — came over to the Cubs in a trade for Buck Coats with the Cincinnati Reds as a player to be named in 2007.
The Dominican native has appeared in 44 big-league games with the Cubs, sporting a 5.04 career ERA and 1.41 WHIP. But he hasn't appeared in an MLB game since the 2011 season after undergoing Tommy John surgery on his elbow and missing the entire 2012 campaign.
As he made his way back last season, Mateo pitched in 24 games across three levels in the Cubs system with a 1.74 ERA in 31 innings.
Mateo appeared in four games with the Diamondbacks in spring training, allowing just one run in four innings.
Strong outing for Hammel
Jason Hammel pitched well in the Cubs' minor-league intrasquad game Thursday, allowing three runs (two earned) and eight hits in six innings. He did not walk a batter and struck out four in 75 pitches.
Hammel, 31, is slated to be the team's No. 4 starter when camp breaks later this month. The fifth spot in the rotation has yet to be decided.