There are certainly some worthy fellows who I've left off of this slideshow. Here is my attempt to mollify some of the potential outcry for the guys who didn't make the final cut.
Devin Hester, Chicago Bears: He's still one of the most dangerous return guys in the league and has transformed himself into a nifty receiver as well.
Champ Bailey, Denver Broncos: A supremely gifted athlete, the Broncos cornerback returned kicks earlier in his career and could swing over to safety and perform decently.
Brian Westbrook, free agent: Although he's certainly in the twilight of his career, Westbrook was an amazing talent for the Philadelphia Eagles as a receiver and runner.
He played sparingly for the San Francisco 49ers last year, but if he can regain his mid-career form, he can still contribute to another team.
Reggie Bush, Miami Dolphins: Bush is a quick-cutting running back who makes other players miss in space. He has great hands and can line up at receiver if needed.
Honorary Versatile Player
Mike Vrabel, New England Patriots and Kansas City Chiefs: As a hard-hitting linebacker, Vrabel ranked in the upper echelon of NFL defenders. He also entered games as a tight end in goal line packages and ended his career with 10 receiving touchdowns.
Vrabel carved out a unique place for himself on both sides of the ball, and even though he retired after the 2010 season, he's still the "Swiss standard" for versatile players of the past 15 years.