A Cubs starting rotation that has been the strength of its major-league-best start to the season took a hit Friday when Tyler Chatwood was scratched from his scheduled start against the Brewers because of "mid-back tightness."
The Cubs say they consider Chatwood's status day-to-day, and manager David Ross said after Friday's 4-3 loss to the Brewers that Chatwood might be an option for one of the starts in Monday's doubleheader against the Cardinals if he's ready to pitch then.
Right-hander Alec Mills, who was scheduled to start Saturday, moved up a day to take Chatwood's place and retired the first 12 batters he faced before eventually giving up a run in the fifth and a three-run homer to Christian Yelich in the sixth.
Mills had not pitched since Aug. 3, before the Cubs series last weekend in St. Louis was postponed by the Cardinals' coronavirus outbreak.
Ross said he expects right-hander Colin Rea to start Saturday against the Brewers.
Chatwood's status is especially important with the Cubs scheduled to play two doubleheaders against the Cardinals in three days next week and the injured Jose Quintana (thumb) likely at least a week away from returning.
Entering play Friday night, the Cubs rotation was 12-3 with a 2.55 ERA.
Mills had allowed two runs in 13 innings (1.38 ERA) in two starts before Friday.
Chatwood (2-1, 5.40) opened the season with two impressive starts before getting hit hard last week in Kansas City.