Strop has a moderate left hamstring strain which will keep him out for the remainder of the regular season, Sahadev Sharma of The Athletic reports.

As confirmed by an MRI, Strop will end up missing a few weeks after injuring his hamstring while running to first base during Thursday's game against Washington. With the Brewers breathing down Chicago's neck for the NL Central crown, there's a chance the Cubs will need to play in the Wild-Card game Oct. 2, so Strop will be re-examined following the team's three-game set with St. Louis to close out the regular season to see if he'll be ready to take the mound again. In his absence, Justin Wilson, Steve Cishek, Brandon Kintzler and potentially Jesse Chavez could see work in the ninth inning as manager Joe Maddon looks for a steadying presence to close out games.

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