Quintana (thumb) is expected to resume throwing Thursday, Jon Heyman of MLB Network reports.
Quintana had his stitches removed Wednesday and is set to resume throwing for the first time since he underwent microscopic surgery on his left thumb in early July. The left-hander will likely miss the start of the regular season, but the team should know more once he's able to increase his throwing program. Alec Mills could step in as a starter for the Cubs while Quintana is on the mend.