Borucki was promoted to Triple-A Buffalo and will start for the Bisons on Thursday, The Buffalo News reports.
The Jays' 15th-round pick in 2012 began this season at High-A, but his impressive campaign has Borucki standing at MLB's gate. A top left-handed prospect, the 23-year-old owns a nifty 3.06 ERA, 1.12 WHIP and 9.4 K/9 through 26 games (25 starts) combined at High- and Double-A in 2017. Considering the big-league club is unlikely to make the playoffs, Borucki could be in line to make his MLB debut in a September spot start.