The Cubs have optioned Kohl Stewart to Triple-A and recalled Trevor Megill, per Meghan Montemurro of the Chicago Tribune (via Twitter).
Stewart has been a spot starter for the Cubs this season, his first with the club after being signed as a minor league free agent. The 26-year-old former Minnesota Twin has made three starts giving up eight earned runs in 12 2/3 innings with 10 strikeouts to two walks, though he has also hit two batters.
Megill has two scoreless innings under his belt this season, his first action at the big league level. Megill was a seventh round draft choice of the Padres back in 2015.