The St. Louis Cardinals have recalled left-handed pitching prospect Cooper Hjerpe from Triple-A Memphis for his major league debut, per MLB Trade Rumors. The team sent righty Hancel Rincón to Memphis in a corresponding move.

Hjerpe, the Cardinals' No. 18 prospect according to MLB.com, will make his debut Sunday against the Colorado Rockies. He will follow right-handed starter Kyle Leahy, who is scheduled to pitch at least the first couple of innings, per reporting from the St. Louis Post-Dispatch cited by MLB Trade Rumors. The game is set for 2:10 p.m. central time at Coors Field.

MLB.com's reporting suggests Hjerpe's call-up comes despite injury concerns in his background, though the available reporting does not detail the nature or severity of those injuries.