HOUSTON — The AL West-leading Houston Astros have acquired lefty Francisco Liriano from the Toronto Blue Jays, adding him to a rotation that’s been banged up this season.

The Astros traded outfielders Nori Aoki and Teoscar Hernandez on Monday for Liriano.

The 33-year-old Liriano is 6-5 with a 5.88 ERA in 18 starts this season. He is expected to join the Astros on Tuesday.

Houston, which owns the best record in the AL, put righty Lance McCullers on the 10-day disabled list Monday with back discomfort. Ace Dallas Keuchel and Collin McHugh recently came off the DL.

Aoki hit .272 with 19 RBIs in 71 games in his first season with Houston. Hernandez spent most of the season at Triple-A Fresno, where he hit .279 with 12 homers and 44 RBIs.