Baltimore RavensOn the evening of Feb. 3, 2013, the Ravens and San Francisco 49ers met to decide NFL supremacy. On Sunday afternoon, the two teams play again, hoping to stave off 2015 irrelevance. Staying on the NFL mountaintop has proven difficult for both organizations since Super Bowl XLVII. Retirements, free-agent departures and injuries have whittled away talented and deep rosters. There have been off-field issues and on-field deficiencies. After engaging in a classic shootout on the sports' biggest stage,