The Cubs acquired 25-year old RHSP Alec Mills from the Kansas City Royals on Wednesday in exchange for minor league OF Donnie Dewees.
LHRP David Rollins has been Designated for Assignment by the Cubs to make room for Mills on the MLB Reserve List (40-man roster).
Mills had been Designated for Assignment by Kansas City earlier Wednesday after the Royals signed free-agent (and ex-Cub) RHSP Jason Hammel, so the Cubs did not waste any time going after Mills once he hit the DFA list.