Wide receiver Jauan Jennings, a backup, is ascending and asserting himself as one of the best players on the team. Meanwhile, fullback Kyle Juszczcyk, a starter, is beginning to age and decline. Now seems like the perfect time to replace Juszczyk.

Fred Warner furthered his early Defensive Player of Year case with a spectacular interception return for a touchdown in the San Francisco 49ers' Week 4 win over the New England Patriots, and he may still have a chance to pad his resume in Week 5 despite suffering an ankle injury.