The Arizona Fall League lost a little of its star power this week, as Mike Stanton and Jason Heyward, two of the top outfield prospects in baseball, were sent home by their teams because of injuries.

Stanton, Florida’s top prospect, was hitting a Fall League-leading .478 before being shut down with a back injury. He had hit only one home run but was 11-for-23 with four stolen bases before the injury flared up. Heyward, the Braves’ top prospect, was sent home with a strained hamstring that also led to back inflammation according to the Atlanta Journal-Constitution. He was 4-for-14 with three doubles in four games in Arizona.

Both players are expected to be fully healthy before spring training.