Morrall backed up four Hall of Fame quarterbacks in his career and was the NFL MVP in 1968

Moving the franchise from Cleveland to Baltimore in the 1990s has kept Art Modell out of the Hall of Fame

Teamed with Hanford Dixon to give the Browns a shutdown pair of CBs in the 1980s

Eric Metcalf became the first player in NFL history with 7,000 yards in offense and 7,000 yards in kick returns

Karl Mecklenburg lined up at eight different spots in Denver's defensive front in his career

Eddie Meador went to Pro Bowls at both safety and cornerback and was one of 3 safeties selected to the 1960s NFL all-decade team

Tim McDonald was another link in the chain of great Southern Cal safeties who became Pro Bowlers

Jerry Mays went to seven Pro Bowls in his 10-year career

Clay Matthews is Cleveland's all-time leading sacker with 76 1/2

Robert Mathis led the NFL in sacks in 2013 and retired after 13 seasons with 123