As expected, the club claimed the 12-time All-Star slugger on waivers from the Los Angeles Dodgers on Monday, hoping his bat can help them make a playoff push.
Chicago is beginning a 10-game road trip to Cleveland, Boston and Detroit 4 1/2 games behind first-place Minnesota in the AL Central.
Ramirez is back in the AL after a four-year stay in Los Angeles.
He batted .311 with eight homers and 40 RBIs in 66 games with the Dodgers this season. Ramirez, who will be playing for his fourth major league team, was on the disabled list from July 20 to Aug. 20 with a right calf strain. He missed 33 games.