He's expected to return before the end of the regular season.
The Cubs announced Friday that catcher Willson Contreras has a right moderate hamstring strain that could take from four to six weeks to heal.
"I don't know if it's going to be before the [end of] season or in the playoffs", he said.
Contreras was hurt when he was running out a groundball in the eighth inning of a loss at San Francisco on Wednesday.
Hamstring strain could sideline Cubs catcher Willson Contreras up to six weeks
The catcher's injury came at the worst possible time, as he was coming off National League player of the week honors after hitting five home runs in six games last week.
Entering play Friday, the Cubs led a tight four-horse race in the NL Central by a game over the Cardinals, with the Brewers two games back and the Pirates three games back.
On Thursday, Contreras thanked everyone for their support on his way to get the MRI. At that point, he will be evaluated and the Cubs will have a better idea on his timetable for a return. The switch-hitter batted.192 with two doubles, one home run and two RBI in 11 games with the Cubs during his first stint from June 28-Aug.
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