Sources: Colts' Pierce out weeks; Slayton to join for WR depth

Indianapolis Colts wide receiver Alec Pierce is expected to miss several weeks after aggravating a left heel injury he suffered in Sunday night's loss to the Kansas City Chiefs, sources told NFL Network's Ian Rapoport.

Pierce will attempt to rehab the injury rather than have surgery, sources said, with the hope that he could return midseason. Surgery is still on the table depending how the rehab goes,. It's likely the wideout will be placed on injured reserve while he recovers.

The injury is to the same heel that Pierce had surgically repaired in March. His recovery from that procedure stretched longer than expected, with him missing training camp and only returning to practice last month.

Pierce, who signed a four-year, $114 million contract in March, was expected to be a centerpiece of the Colts' offense this season. With Pierce out, veteran receiver Laquon Treadwell took the majority of his snaps against the Chiefs and finished with three catches for 61 yards.