Matt Mitrione might not be name that immediately rings a bell for New York Giants fans. Mitrione was an undrafted free agent out of Purdue and played in nine games for Big Blue in 2002 before a foot injury caused him to be placed on injured reserve for all of 2003. He was then released and spent some time with the San Francisco 49ers and Minnesota Vikings before his NFL career came to an end in 2005.
Now, Mitrione is one of the top MMA heavyweights in the world. After the NFL, he ended up on the 10th season of The Ultimate Fighter.