• Hot Stove Tracker: Free agents and trades
With the moves, the Cubs' 40-man roster is now at 33.
An Illinois native, Patton, 27, was a 24th-round Draft pick of the Royals in 2011, and he has appeared in 36 games with the Rangers (nine in 2014; 27 in '15), all in relief. He also appeared in 26 games for Triple-A Round Rock in '15 and picked up 11 saves, fanning 36 over 27 innings. Texas acquired him in July 2014 from Kansas City for Jason Frasor.
Overall, Patton is 2-1 with a 6.75 ERA in his 36 Major League outings, averaging more than one strikeout per inning with 36 strikeouts in 33 1/3 innings.
Delarosa batted .273 (70-for-256) with 20 doubles, two triples, no home runs and 30 RBIs in 62 games for short-season Class A Eugene last season.
Carrie Muskat is a reporter for MLB.com. She writes a blog, Muskat Ramblings. You can follow her on Twitter @CarrieMuskat and listen to her podcast. This story was not subject to the approval of Major League Baseball or its clubs.