The San Francisco 49ers and Baltimore Ravens each have four players with Super Bowl experience.The 49ers' Clark Haggans and the Ravens' Anquan Boldin got that experience with the Arizona Cardinals following the 2008 season.2012 Receiving ComparisonBoldin, 32, appears primed to play an important role in the Ravens-49ers outcome Feb. 3 in New Orleans. Though his 113-game receiving streak ended in Week 15, Boldin leads the league in receiving yards (276), receiving touchdowns (three), and receiving first downs (14) during this postseason.