​In a move you had to see coming due to his significant bullpen woes, the ​Cubs have optioned left-hander Randy Rosario to their Triple-A affiliate and recalled Alec Mills from Iowa. 

Mills started one game in the spring for the Cubs, going five innings and allowing just one run. The 27-year-old will look to capitalize on this opportunity and stick in the big leagues after several up-and-down stretches.

Rosario has struggled out of the bullpen this season, as he has posted a 5.14 ERA in seven games this season. He has allowed four earned runs and eight hits through his seven innings, which cannot be close to what the ​Cubs were hoping for from the young pitcher, who posted a 3.66 ERA in 44 games last season. 


The move to bring Mills up Sunday could just be roster management by Joe Maddon as well, as ​Rosario had a heavy workload on Saturday, throwing multiple innings. Tyler Chatwood is on the hill for the Cubs in this series finale, and he has yet to make a start this season, which means he will have a pitch cap, as well as the early hook if he gets into trouble.

Mills last threw on April 17, when he tossed four innings, giving up just one run. Being the more rested arm will give him the opportunity to impress in a potential long relief role Sunday, but he could very well be making the trip back to Iowa shortly, as Rosario seems to be in line to get called back up. 

The Cubs will battle the ​Diamondbacks at Wrigley Field, as Chatwood will face Robbie Ray. The Cubs, who were shut out Saturday, will look to bounce back, and Alec Mills could potentially be a part of the victory bid.