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National BFF Day
Take a look at some of the closest friendships in NFL history.

San Francisco 49ers quarterback Joe Montana (16) celebrates with wide receiver Jerry Rice (80) during an NFL game against the St. Louis Cardinals Sunday, Nov. 9, 1986 in San Francisco. The 49ers won the game, 43 to 17. (Greg Trott/Associated Press)

(Associated Press)

San Diego Chargers running back LaDainian Tomlinson, right, runs a drill with fullback Lorenzo Neal, left, during practice on Thursday, Jan. 10, 2008, in San Diego. (Denis Poroy/Associated Press)

The New York Jets "Sack Exchange," from left: defensive end Joe Klecko, defensive tackles Marty Lyons and Abdul Salaam and defensive end Mark Gastineau, stand reunited during a team practice on Wednesday, Jan. 6, 1982 at the Jets training facility at Hofstra University in Hempstead, Long Island. (Dudek/Associated Press)

The Washington Redskins celebrate a second-quarter touchdown during Super Bowl XVII on Sunday, January 30, 1983 against the Miami Dolphins. Getting in on the 'Skins high-fives are Alvin Garrett (89), Clarence Harmon (38), Rick Walker (88), and Virgil Seay (80). (Associated Press)

New England Patriots' Tom Brady, right, talks with teammate Deion Branch during NFL football training camp in Foxborough, Massachusetts, on Tuesday, Aug. 2, 2011. (Winslow Townson/Associated Press)

Dallas Cowboys Troy Aikman (8), Emmitt Smith (22) and Michael Irvin (88) celebrate Smith's second-quarter touchdown run in the NFC Championship game against the Green Bay Packers Sunday, Jan. 14, 1996, in Irving, Texas. (Tim Sharp/Associated Press)

Seattle Seahawks free safety Earl Thomas (29) cebrates with strong safety Kam Chancellor (31) as cornerback Richard Sherman (25) watches during Super Bowl XLVIII at MetLife Stadium on Sunday, Feb. 2, 2014, in East Rutherford, New Jersey. The Seahawks won, 43-8. (Paul Sancya/Associated Press)

HONOLULU, HI- FEBRUARY 4: Indianapolis Colts wide receiver Marvin Harrison (88) is congratulated by quarterback Peyton Manning (18) of the AFC in the end zone against the NFC in the 2001 NFL Pro Bowl at Aloha Stadium on February 4, 2001 in Honolulu, Hawaii. The AFC defeated the NFC, 38-17. (Associated Press/NFL Photos)

Mark Jackson, Ricky Nattiel and Vance Johnson. (Associated Press)

Kurt Warner, Torry Holt, Issac Bruce and Marshall Faulk. (Associated Press)

Terrell Owens. (Associated Press)