Mason Walker Crosby (born September 3, 1984) is an American football placekicker for the Green Bay Packers of the National Football League (NFL). He played college football for the University of Colorado, and earned unanimous All-American honors. The Packers chose him in the sixth round of the 2007 NFL Draft, and he was a member of the Packers' Super Bowl XLV championship team against the Pittsburgh Steelers.