Brett Favre passed Dan Marino on Sunday as the NFL's all-time yardage leader. Now, in 18 seasons Favre has passed for 65,127 yards. (Photo by Kirby Lee/Sport-US PRESSWIRE)

With 61,361 career passing yards in 17 NFL seasons, Hall of Fame quarterback Dan Marino is second on the NFL's all-time list. (Photo by Al Messerschmidt/WireImage.com)

With 51,475 career passing yards in 16 seasons with the Denver Broncos, quarterback John Elway is a distant third on the all-time list. (Photo by Ned Bonzi/Getty Images)

Quarterback Warren Moon played 17 seasons in the NFL with Houston, Minnesota, Seattle and Kansas City, compiling 49,325 yards, fourth-most on the all-time list. Moon played his first six professional seasons in the CFL, where he amassed 21,228 passing yards. (Photo by Stephen Dunn/Getty Images)

Hall of Fame quarterback Fran Tarkenton finished his career atop the all-time leaderboard with 47,003 passing yards. Since Tarkenton retired in 1978 after 18 seasons with the Vikings and Giants, four players have passed him, and a fifth -- Peyton Manning -- is on pace to do so in the next few years. (Photo by NFL/WireImage.com)