Former Miami Dolphins football quarterback Bob Griese, left, and Hall of Fame Dolphins Coach Don Shula, second from right, and Larry Csonka, right, pose for photographs with a signed team jersey during a ceremony in the East Room of the White House in Washington, Tuesday, Aug. 20, 2013, where the president honored the Super Bowl VII football Champion Miami Dolphins. The 1972 Miami Dolphins remain the only undefeated team in NFL history. (AP Photo/Pablo Martinez Monsivais)

The Vince Lombardi Trophy, that the 1972 Super Bowl VII champions Miami Dolphins won, is seen in the East Room of the White House in Washington, Tuesday, Aug. 20, 2013. The 1972 Miami Dolphins remain the only undefeated team in NFL history. (AP Photo/Pablo Martinez Monsivais)

People take photographs of President Barack Obama as he enters the East Room of the White House in Washington, Tuesday, Aug. 20, 2013, for a ceremony where the president honored the Super Bowl VII football Champion Miami Dolphins, forty-one years after their perfect football season. The 1972 Miami Dolphins remain the only undefeated team in NFL history. (AP Photo/Jacquelyn Martin)

Members of the 1972 Super Bowl VII football Champion Miami Dolphins, from left, quarterback Bob Griese, wide receiver Paul Warfield, and fullback Larry Csonka, right, are introduced during a ceremony in the East Room of the White House in Washington, Tuesday, Aug. 20, 2013. The 1972 Miami Dolphins remain the only undefeated team in NFL history. (AP Photo/Pablo Martinez Monsivais)

Forty-one years after their perfect football season, President Barack Obama honors the Super Bowl VII football Champion Miami Dolphins, Tuesday, Aug. 20, 2013, in the East Room of the White House in Washington. From left are, guard Larry Little, quarterback Bob Griese, running back Larry Csonka, the president and Coach Don Shula. The 1972 Miami Dolphins remain the only undefeated team in NFL history. (AP Photo/Evan Vucci)

Forty-one years after their perfect football season, President Barack Obama honors the Super Bowl VII football Champion Miami Dolphins, Tuesday, Aug. 20, 2013, in the East Room of the White House in Washington. The 1972 Miami Dolphins remain the only undefeated team in NFL history. From second from left are, guard Larry Little, quarterback Bob Griese, wide receiver Paul Warfield, running back Larry Csonka, the president and Coach Don Shula. (AP Photo/Evan Vucci)

1972 Miami Dolphins head football coach Don Shula, right, shares a laugh with President Barack Obama, during a ceremony in the East Room of the White House in Washington, Tuesday, Aug. 20, 2013, where the president honored the Super Bowl VII football champion Miami Dolphins. The 1972 Miami Dolphins remain the only undefeated team in NFL history. (AP Photo/Evan Vucci)

President Barack Obama points to Hall of Fame coach Don Shula, far right seated, during a ceremony in the East Room of the White House in Washington, Tuesday, Aug. 20, 2013, where the president honored the Super Bowl VII football Champion Miami Dolphins. From left are, guard Larry Little, the president, wide receiver Paul Warfield fullback Larry Csonka, and Shula. Forty-one years after their perfect football season, the 1972 Miami Dolphins remain the only undefeated team in NFL history. (AP Photo/Pablo Martinez Monsivais)

Forty-one years after their perfect football season, President Barack Obama, center, honors the Super Bowl VII Champion Miami Dolphins in the East Room of the White House in Washington, Tuesday, Aug. 20, 2013. The 1972 Miami Dolphins remain the only undefeated team in NFL history. Hall of Fame coach Don Shula, far right, and many of his football players from the 1972 team attended the ceremony. (AP Photo/Jacquelyn Martin)

Former Miami Dolphin football quarterback Bob Griese, left, laughs with President Barack Obama in the East Room of the White House in Washington, Tuesday, Aug. 20, 2013, during a ceremony where the president honored the Super Bowl VII football Champion Miami Dolphins, forty-one years after their perfect football season. The 1972 Miami Dolphins remain the only undefeated team in NFL history. (AP Photo/Jacquelyn Martin)

Former Miami Dolphins fullback Larry Csonka, second from left, grimaces as Hall of Fame coach Don Shula jokingly shakes a fist at him, during a ceremony in the East Room of the White House in Washington, Tuesday, Aug. 20, 2013, where President Barack Obama honored the Super Bowl VII football Champion Miami Dolphins. The 1972 Miami Dolphins remain the only undefeated team in NFL history. Wide receiver Paul Warfield is at left. (AP Photo/Jacquelyn Martin)

Former Miami Dolphins football quarterback Bob Griese, left, President Barack Obama and 1972 Dolphins Coach Don Shula, right, hold a signed jersey in the East Room of the White House in Washington, Tuesday, Aug. 20, 2013, during a ceremony honoring the Super Bowl VII football Champion Miami Dolphins. The 1972 Miami Dolphins remain the only undefeated team in NFL history. Form left are, Griese, wide receiver Paul Warfield, the president, running back Larry Csonka and Shula. (AP Photo/Jacquelyn Martin)

President Barack Obama shakes hands with Hall of Fame football coach Don Shula, right, as he is presented with a team jersey by Dolphins Chairman of the Board/Managing General Partner Stephen Ross, center, and fullback Larry Csonka, second from the right, during a ceremony in the East Room of the White House in Washington, Tuesday, Aug. 20, 2013, where the president honored the Super Bowl VII football Champion Miami Dolphins . Forty-one years after their perfect football season, the 1972 Miami Dolphins remain the only undefeated team in NFL history. (AP Photo/Pablo Martinez Monsivais)

Forty-one years after their perfect football season, President Barack Obama smiles during a ceremony in the East Room of the White House in Washington, Tuesday, Aug. 20, 2013, to honor the Super Bowl VII football Champion Miami Dolphins. The 1972 Miami Dolphins remain the only undefeated team in NFL history. From second from left are, linebacker Nick Buonticonti, guard Larry Little, quarterback Bob Griese, wide receiver Paul Warfield, running back Larry Csonka, the president, and Coach Don Shula, far right. (AP Photo/Evan Vucci)

President Barack Obama honors the Super Bowl VII football Champion Miami Dolphins, Tuesday, Aug. 20, 2013, in the East Room of the White House in Washington. The 1972 Miami Dolphins remain the only undefeated team in NFL history. From left are, quarterback Bob Griese, the president wide receiver Paul Warfield, running back Larry Csonka and hall of fame coach Don Shula, far right. (AP Photo/Jacquelyn Martin)

The Super Bowl VII Champion Miami Dolphins applaud as President Barack Obama shakes hands at the end of a ceremony honoring the team forty-one years after their perfect football season, in the East Room of the White House in Washington, Tuesday, Aug. 20, 2013. The 1972 Miami Dolphins remain the only undefeated team in NFL history.(AP Photo/Jacquelyn Martin)

President Barack Obama jokes with Miami Dolphins owner Stephen Ross, left, not shown and Dolphins kicker Garo Yepremian, center, in the East Room of the White House in Washington, Tuesday, Aug. 20, 2013, during a ceremony where the president honored the Super Bowl VII football Champion Miami Dolphins, forty-one years after their perfect football season. The 1972 Miami Dolphins remain the only undefeated team in NFL history. (AP Photo/Jacquelyn Martin)

1972 Miami Dolphins football kicker Garo Yepremian, center, arrives in the East Room of the White House in Washington, Tuesday, Aug. 20, 2013, for a ceremony hosted by President Barack Obama to honor the Super Bowl VII football champion Miami Dolphins forty-one years after their perfect football season. The 1972 Miami Dolphins remain the only undefeated team in NFL history. (AP Photo/Evan Vucci)

Forty-one years after their perfect football season, President Barack Obama honors the Super Bowl VII Champion Miami Dolphins in the East Room of the White House on Tuesday, Aug. 20, 2013, in Washington. The 1972 Miami Dolphins remain the only undefeated team in NFL history. (AP Photo/Evan Vucci)