Len suffered the injury when he landed after finishing an alley-oop dunk against the Portland Trail Blazers. He left the arena on crutches. Suns coach Jeff Hornacek added Friday that Len will probably sit out Phoenix's last two games before the All-Star break as well.
This is concerning because Len, only 21, has already had surgeries on both ankles. The No. 5 pick in the 2013 draft has shown improvement in more minutes over his rookie year, and is averaging 6.2 points and six rebounds a game.