Francisco Cervelli’s long road to recovery will reach a critical point Sunday when he begins a rehab assignment as a catcher in Double-A Altoona.

Cervelli, who had been the Pittsburgh Pirates’ regular catcher since 2015, has been on the injured list since May 26 with a concussion, the sixth of his career.

Earlier this week, he caught a simulated game thrown by Pirates relief pitcher Keone Kela.