The Denver Broncos have strengthened their defense by signing Talanoa Hufanga and Dre Greenlaw, but their injury histories raise questions about their durability.
The Tampa Bay Buccaneers had a successful season, winning their fourth straight division title. However, they also struggled with injuries and close games.
The Notre Dame Fighting Irish have defied the odds with their depth and resilience, battling through a rash of key injuries to reach the College Football Playoff National Championship.