San Francisco 49ers face a true test of depth as injuries shake up their wide receiver group heading into a crucial matchup against the Atlanta Falcons. With Christian McCaffrey poised to line up as a receiver and Kaelon Black and Jordan James ready for expanded roles in the backfield, can the 49ers maintain their undefeated streak and showcase their running game versatility? Ji'Ayir Brown, Malik Mustapha, and Marques Sigle headline a young 49ers safety group that’s shutting down opposing offenses, combining for zero yards allowed on key coverage snaps and hard-hitting plays. As San Francisco looks to go 7-0 before the bye week, the emergence of these young talents on both sides of the ball could be the turning point for a deep playoff push.