Ever since making the switch from high school receiver to running back in college, Isaac Guerendo has had few opportunities to show what he can do as a runner.

The San Francisco 49ers placed running back Christian McCaffrey on injured reserve Tuesday a day after coach Kyle Shanahan indicated that both he and fellow running back Jordan Mason would go on IR after suffering injuries in the team’s Week 13 loss to the Buffalo Bills.

Many are curious about the 49ers’ injury updates, which put Christian McCaffrey and Jordan Mason on IR. Fans now wonder how the team will handle the rest of the NFL season without their key players. Let’s explore Mason’s injury,