entire season – or more – at a time. Currently, Notre Dame reserves its green jerseys for "special" occasions. Often on such occasions, the Irish will take the field for warmups dressed in blue, only to switch to green when they go back to the locker room before kickoff. This tradition was started by Dan Devine in 1977 before the USC game. Notre Dame has also been known to switch jerseys at halftime, as during the 1985 USC game, and in the loss to Nile Kinnick-led Iowa in 1939, although this was to help avoid confusion between their navy uniforms and Iowa's black ones. The current design of the jersey is kelly green with gold numbers and white outlining. For the 2006 Army game, Coach Charlie Weis broke out the Green jerseys as a reward to his senior players, as well finally ending the string of losses by the Irish when wearing green. Notre Dame wore throwback green jerseys in 2007 against USC in honor of the 30th anniversary of the 1977 National Championship team. On at least one occasion (1992 Sugar Bowl) Notre Dame has worn an away variant of the jersey: a white jersey with green numbers. Champion supplied football jerseys for The University of Notre Dame for over 50 years until they switched to Adidas in 2001. On July 1, 2014, the University of Notre Dame Athletic department began wearing uniforms and footwear supplied by Under Armour. During Gerry Faust's tenure (1981–85), Notre Dame's blue jerseys switched from the traditional navy to royal blue with gold and white stripes on the sleeves. The navy blue jerseys returned in 1984. No uniform numbers have been retired by Notre Dame. Upon being issued a number, each player is given a card that lists some of the more famous players who have worn that particular number. Number 3 is perhaps the most famous number in Irish football history, having been worn by Ralph Guglielmi, George Izo, Daryle Lamonica, Coley O'Brien, Joe Montana, Michael Floyd, Rick Mirer and Ron Powlus, among others. Number 5 is also notable, as it is the only number to be worn by one of the Four Horsemen (Elmer Layden) a Heisman Trophy Winner (Paul Hornung) and a National Title winning Quarterback (Terry Hanratty). Number 7 has been worn by such Irish greats as 1964 Heisman Trophy winner John Huarte, 1970 Heisman runner-up Joe Theismann, Steve Beuerlein,