The Cubs hired veteran Mexican lefty Jorge De La Rosa and placed right-hander Yu Darvish on the 60-day disabled list to give him space on the 40-man roster.
Chicago also sent Dominican left-hander Randy Rosario to his Triple A branch to open a hole for De La Rosa on the active roster yesterday.
With a career of 15 years in the majors, De La Rosa served as a reliever the last two seasons with Arizona after being a starter at the start of his career.
Jorge went 0-2 with a 4.63 ERA in 42 appearances this season before the Diamondbacks put him on assignment last week.
Between 2008 and 2015 he played for the Colorado Rockies, with whom he was primarily a starter, and won 86 victories there, a record for the franchise with 25 years of history.
In his career he is 104-87 with Milwaukee, Kansas City, Colorado and Arizona, his last team, and where just last year he had his first four postseason appearances.
The Cubs contemplate that Darvish plays a simulated game before going to the minor leagues. The Japanese signed a contract of 126 million dollars and six years in February, but has not been able to act since May for injuries.
They beat nationals
Anthony Rizzo received a ticket with full bases in the seventh, and the Cubs beat the Washington Nationals 3-2.
The Cubs managed to win even though they did not hit starter Jeremy Hellickson, who took 17 outs. Jason Heyward gave the first unstoppable against reliever Sammy Solis. De la Rosa remained in the bullpen without seeing action.