SANTA CLARA – Saturday’s preseason opener will unveil a slew of 49ers, some filling in for entrenched starters and others merely auditioning to extend their careers.

And some will miss their debuts because of this training camp’s growing injuries, including top draft pick Mykel Williams (knee) and fifth-round running back Jordan James (finger).

To help with introductions ahead of the 5:30 p.m. kickoff against the Denver Broncos at Levi’s Stadium, here is a quick-reference guide on those first-time Niners:

No. 5 Demarcus Robinson (WR): He’s proven himself as a potential starter, but he’s facing at least a three-game suspension for a drunken-driving charge from last season’s arrest in L.A.

No. 7 Thomas Morstead (P): This 17th-year veteran replaces Mitch Wishnowsky as the punter – and Jak

See Full Page