Joe Flacco

Baltimore Ravens quarterback Joe Flacco (5) holds 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.

Joe Flacco #5 of the Baltimore Ravens holds up the Vince Lombardi Trophy in front of CBS host Jim Nantz following their 34-31 win against the Baltimore Ravens during Super Bowl XLVII at the Mercedes-Benz Superdome on February 3, 2013 in New Orleans, Louisiana.

Joe Flacco #5 of the Baltimore Ravens throws a complete pass in the second half to Ray Rice #27 against NaVorro Bowman #53 of the San Francisco 49ers during Super Bowl XLVII at the Mercedes-Benz Superdome on February 3, 2013 in New Orleans, Louisiana.

Joe Flacco #5 and Jacoby Jones #12 of the Baltimore Ravens celebrate after Flacco threw a 1 yard touchdown pass to Dennis Pitta #88 in the second quarter against the San Francisco 49ers during Super Bowl XLVII at the Mercedes-Benz Superdome on February 3, 2013 in New Orleans, Louisiana.

Photo by Christian Petersen/Getty Images

Joe Flacco #5 of the Baltimore Ravens scrambles with the ball in the first quarter under pressure from Ahmad Brooks #55 of the San Francisco 49ers during Super Bowl XLVII at the Mercedes-Benz Superdome on February 3, 2013 in New Orleans, Louisiana.

Joe Flacco, of the Baltimore Ravens, paces the sideline in the second half during a game against the New England Patriots before a game at at Gillette Stadium on Oct. 17, 2010, in Foxboro, Mass.

Joe Flacco, of the Baltimore Ravens, watches from the bench during the NFL game against the Cincinnati Bengals at Paul Brown Stadium on Dec. 30, 2012, in Cincinnati.

Joe Flacco, of the Baltimore Ravens, heads off the field before the game against the Jacksonville Jaguars at EverBank Field on Oct. 24, 2011, in Jacksonville Fla.

Safety Ed Reed celebrates with quarterback Joe Flacco and teammates after returning a interception for a touchdown in the third quarter against the Cincinnati Bengals at M&T Bank Stadium on Sept. 10, 2012, in Baltimore.

Offensive cordinator Cam Camerson hugs quarterback Joe Flacco during the closing moments of the Ravens 29-14 win over the Houston Texans at M&T Bank Stadium on Oct. 16, 2011, in Baltimore.

Quarterback Joe Flacco walks off the field after the Philadelphia Eagles defeated the Ravens 24-23 at Lincoln Financial Field on Sept. 16, 2012, in Philadelphia.

Quarterback Joe Flacco throws against the Indianapolis Colts during the AFC Wild Card Playoff Game at M&T Bank Stadium on Jan. 6, 2013, in Baltimore.

Quarterback Joe Flacco walks across the field after losing to the Denver Broncos at M&T Bank Stadium on Dec. 16, 2012, in Baltimore.

Dane Fletcher, of the New England Patriots, tackles Joe Flacco in the first quater during their AFC Championship Game at Gillette Stadium on Jan. 22, 2012, in Foxboro, Mass.

Joe Flacco smiles on the sidelines during the game against the Denver Broncos at M&T Bank Stadium on Oct. 10, 2010, in Baltimore. Players wore pink in recognition of Breast Cancer Awareness Month. The Ravens defeated the Broncos 31-17.

Tom Brady, of the New England Patriots, talks with Joe Flacco after defeating the Baltimore Ravens in the AFC Championship Game at Gillette Stadium on Jan. 22, 2012, in Foxboro, Mass. The New England Patriots defeated the Baltimore Ravens 20-23.

Former Audubon High School star quarterback Joe Flacco, center, poses with his high school football coaches, Mark Deal, left, and Ralph Schiavo, right, after learning he was selected in the first round of the NFL Draft by the Baltimore Ravens as the 18th pick overall April 26, 2008, in Audubon, N.J.

Joe Flacco celebrates after a touchdown ran by Ray Rice #27 in the second quarter against the New England Patriots during the 2013 AFC Championship game at Gillette Stadium on Jan. 20, 2013, in Foxboro, Mass.

Quarterback Joe Flacco smiles as he walks off the field against the Cincinnati Bengals at M & T Bank Stadium on Sept. 7, 2008, in Baltimore. The Ravens won 17-10.

Quarterback Joe Flacco scrambles for yardage against the Denver Broncos at M&T Bank Stadium on Dec. 16, 2012, in Baltimore, Maryland.

Quarterback Joe Flacco looks to pass against the Denver Broncos during the AFC Divisional Playoff Game at Sports Authority Field at Mile High on Jan. 12, 2013, in Denver. The Ravens won 38-35 in 2 overtimes.

Head coach John Harbaugh and Joe Flacco celebrate after defeating the New England Patriots in the 2013 AFC Championship game at Gillette Stadium on Jan. 20, 2013, in Foxboro, Mass. The Baltimore Ravens defeated the New England Patriots 28-13.

Joe Flacco celebrates after defeating the New England Patriots in the 2013 AFC Championship game at Gillette Stadium on Jan. 20, 2013, in Foxboro, Mass.. The Baltimore Ravens defeated the New England Patriots 28-13.

Quarterback Joe Flacco moves to pass during the game against the Pittsburgh Steelers on Sept. 29, 2008, at Heinz Field in Pittsburgh, Penn.

Joe Flacco celebrates after throwing a touchdown pass to Anquan Boldin #81 in the fourth quarter against the New England Patriots during the 2013 AFC Championship game at Gillette Stadium on Jan. 20, 2013, in Foxboro, Mass.

Joe Flacco warms up prior to playing against the New England Patriots during the 2013 AFC Championship game at Gillette Stadium on Jan. 20, 2013, in Foxboro, Mass.

Quarterback Joe Flacco delivers a pass and is hit by Jared Allen #69 and Tavares Gooden #56 of the Minnesota Vikings during NFL action at Hubert H. Humphrey Metrodome on Oct. 18, 2009, in Minneapolis, Minn.

Joe Flacco gets pressured by Justin Francis #94 of the New England Patriots during the 2013 AFC Championship game at Gillette Stadium on Jan. 20, 2013, in Foxboro, Mass.

Joe Flacco looks on during warm ups against the Pittsburgh Steelers during the AFC Championship game on Jan. 18, 2009, at Heinz Field in Pittsburgh, Penn.

Joe Flacco scrambles during the game against the Indianapolis Colts at M&T Bank Stadium on Nov. 22, 2009, in Baltimore. The Colts defeated the Ravens 17-15.