FILE - Miami Dolphins' head coach Don Shula, left, and Washington Redskins' defense coach Charley Winner inspect the turf at the Los Angeles Coliseum before the start of Super Bowl game on Jan. 14, 1973 in Los Angeles. The 1973 game was the last Super Bowl held at the Coliseum, which originally was built for the 1932 Summer Olympics and remodeled several times. (AP Photo/File)

FILE - This Dec. 14, 2015 file photo shows former Miami Dolphins player Larry Csonka during the Dolphins All-Time 50th Anniversary Team ceremony in Miami Gardens, Fla. At the 1973 Super Bowl in Los Angeles, Csonka brushed aside Washington Redskins tacklers all day, piling up 112 yards, nine short of the Super Bowl record. (AP Photo/Wilfredo Lee, File)

FILE - Miami Dolphins coach Don Shula, center, is carried off the field after his team won the NFL football Super Bowl game over Washington Redskins in Los Angeles, Jan. 14, 1973. It can be argued — and has been for decades — that a perfect record including winning a championship makes that team the best in its sport. And maybe the 1972 Miami Dolphins wouldn't have matched up with, say, the great Steelers dynasty of the later 1970s. Or the dominant 49ers of the 1980s. Or the Cowboys Triplets of the 1990s. No matter: Miami owns the only unblemished record in the Super Bowl era. (AP Photo/File)

FILE - Washington Redskins' Mike Bass (41) gets the ball which deflected out of Miami Dolphins kicker Garo Yepremian's (1) hands during NFL football's Super Bowl VII in Los Angeles, Jan. 14, 1973. Yepremian's aborted field goal attempt turned into perhaps the worst try at a pass in NFL history. (AP Photo, File)

FILE - A field goal attempt by Garo Yepremian (1) of the Miami Dolphins is blocked by the Washington Redskins in the Super Bowl game in Los Angeles, Jan. 14, 1973. Yepremian's blocked field goal turned into perhaps the worst try at a pass in NFL history. Washington's Mike Bass grabbed it and headed to the end zone for a 49-yard touchdown that was his side's only score in the 14-7 defeat.(AP Photo/File)

FILE - Miami Dolphins' Jim Kiick (21) heads toward goal line to score in the second quarter of the Super Bowl against the Washington Redskins in Los Angeles, Jan. 14, 1973. Kiick has just taken handoff from quarterback Bob Griese (12), right. Dolphins' Jim Langer (62) and Larry Csonka (39) make a path for Kiick. (AP Photo/File)

FILE - Washington Redskins coach George Allen, right, talks to newsmen Jan. 14, 1973, after his team was defeated by the Miami Dolphins in the NFL football Super Bowl in Los Angeles. (AP Photo, File)

FILE - Bob Griese, quarterback of the Miami Dolphins, left, is pictured in New Orleans with coach Don Shula, Jan. 15, 1972, in preparation for the Super Bowl. The 1972 Miami Dolphins own the only unblemished record in the Super Bowl era. (AP Photo/Toby Massey, File)