Collins was limited to just 11 games this year after missing time earlier in the season recovering from shoulder surgery.
Portland Trail Blazers forward Zach Collins will undergo season-ending surgery to repair a hairline fracture on his left ankle, the team announced Friday.
Further imaging revealed a medial malleolus stress fracture in the ankle. No date has been set for the procedure.
Collins hasn't played since Aug. 13 against the Nets. He appeared in just 11 games this season after missing time recovering from left shoulder surgery. Collins averaged 7.0 points and 6.3 rebounds in 26.4 minutes per game this season.