CHICAGO — Left-hander Jon Lester was put on the 10-day injured list by the Chicago Cubs because of a strained left hamstring.

Injured while scoring from second base on Ben Zobrist's single in Monday's home opener, the Cubs' ace will miss at least one turn. The five-time All- Star is 1-0 with a 2.57 ERA in three starts after going 18-6 with a 3.32 ERA last year.

Chicago put Lester on the IL retroactive to Tuesday.

Lefty reliever Tim Collins was recalled from Triple-A Iowa on Wednesday. The 29-year-old is 0-0 with a 3.38 ERA in three games for Iowa. He pitched in 38 games for Washington last season.