Kansas City Chiefs outside linebacker Justin Houston (second from left) shakes hands with Detroit Lions wide receiver Calvin Johnson after the NFL football game between the Lions and Chiefs at Wembley Stadium in London on Nov. 1.
Chris Kluwe (left) congratulates Blair Walsh after Walsh kicked a 56-yard field goal during a game against the Houston Texans in 2012. Kluwe says friendships in the NFL can be fleeting, but also close.
Kicker Chandler Catanzaro of the Arizona Cardinals kicks an extra point against the Kansas City Chiefs during a pre-season NFL game at the University of Phoenix Stadium on Aug. 15 in Glendale, Ariz.
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NFL Commissioner Roger Goodell admitted last September that he "got it wrong" when it came to handling the recent Ray Rice incident, pledging that he will get it right.
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