Logs eight carries in preseason win

Black rushed eight times for 33 yards and wasn't targeted in the 49ers' 41-17 preseason win over the Chargers on Thursday night.

The rookie third-round pick operated as the starting running back with Christian McCaffrey (undisclosed) inactive, and Black immediately recorded a five-yard gain on the 49ers' first play from scrimmage. The Indiana product also had eight- and nine-yard runs on San Francisco' second possession as he continued to make a strong case for the No. 2 job to open the regular season. Black saw backfield mate Sincere McCormick put together an impressive 6-53-1 line on the ground Thursday as well, but the former likely has the inside track to serve as McCaffrey's primary backup in a backfield where Jordan James (ribs) and Isaac Guerendo (PUP-pectoral) are also vying for roles.