The NFC champion San Francisco 49ers had nine defenders start every game.
Overall, the 49ers had 17 players start 16 games during the regular season. Eight Ravens players started 16 games apiece.
Roster health won't grab headlines the way brotherly coaching rivalries will grab them at the Super Bowl this week, but we all know which subject matters more.
Baltimore's IR list features top cornerback Lardarius Webb, inside linebacker Jameel McClain and guard Jah Reid, all starters. It features special-teams contributors LaQuan Williams and Bobby Rainey, plus lesser contributors such as Damien Berry, Emanuel Cook, Christian Thompson, Tommy Streeter and Anthony Levine.
The 49ers' IR list features starting receiver Mario Manningham, No. 2 running back Kendall Hunter, third/fourth receiver Kyle Williams, backup outside linebacker Parys Haralson and backup tight end Demarcus Dobbs.
Defensive lineman Justin Smith's ability to return from a triceps injury suffered in Week 15 has been key for the 49ers. Smith, Suggs and Lewis all returned from arm injuries that threatened to end their seasons.