Wallace isn't guaranteed to push McCoy off the roster, but this is a sign that the team is uneasy about its veteran insurance behind Colin Kaepernick. Although coach Jim Harbaugh has raved about seventh-round draft pick B.J. Daniels, the rookie is better suited for the developmental role of third quarterback.
To free up roster space for Wallace, the 49ers waived wide receiver Ricardo Lockette. The subject of endless offseason puff pieces as Kaepernick's roommate, Lockette has made a habit of shining in minicamp, only to disappear when the pads come on in August.
It was just a few months ago that Harbaugh said of Lockette: "There's something special there. I just feel it."