Baltimore Ravens quarterback Joe Flacco speaks at a news conference at the team's practice facility in Owings Mills, Md., Monday, March 4, 2013. Flacco agreed to a contract that will make him the richest quarterback in NFL history after leading the Ravens to a Super Bowl XLVII victory over the San Francisco 49ers. (AP Photo/Patrick Semansky)
Baltimore Ravens quarterback Joe Flacco looks at the inside of 2014 Corvette Stingray following a news conference after NFL Super Bowl XLVII football game Monday, Feb. 4, 2013, in New Orleans. The Ravens defeated the San Francisco 49ers 34-31.(AP Photo/Darron Cummings)
Baltimore Ravens quarterback Joe Flacco (5) holds up the Vince Lombardi Trophy after defeating the San Francisco 49ers 34-31 in the NFL Super Bowl XLVII football game Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Patrick Semansky)
Baltimore Ravens quarterback Joe Flacco (5) is lifted into the air by teammates after defeating the San Francisco 49ers 34-31 in the NFL Super Bowl XLVII football game, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Bill Haber)
Baltimore Ravens linebacker Ray Lewis, left, and quarterback Joe Flacco celebrate their 34-31 win against the San Francisco 49ers in the NFL Super Bowl XLVII football game, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Julio Cortez)
Baltimore Ravens quarterback Joe Flacco (5) celebrates with wide receiver Jacoby Jones (12) after throwing Jones a touchdown pass in the second quarter against the San Francisco 49ers during the NFL Super Bowl XLVII football game, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Patrick Semansky)
Baltimore Ravens wide receiver Jacoby Jones (12) celebrates his 56-yard touchdown with quarterback Joe Flacco (5) and Kelechi Osemele (72) during the first half of the NFL Super Bowl XLVII football game against the San Francisco 49ers, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Dave Martin)
Baltimore Ravens quarterback Joe Flacco (5) passes against the San Francisco 49ers during the first half of NFL Super Bowl XLVII football game, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Bill Haber)
Baltimore Ravens quarterback Joe Flacco smiles at back up quarterback Tyrod Taylor during practice Saturday, Jan. 26, 2013 in Owings Mills, Md. (AP Photo/Gail Burton).