Central Michigan OT Joe McMahon officially submitted paperwork to enter the NFL's supplemental draft, joining Florida State WR Corey Surrency and Kentucky DE Jeremy Jarmon as eligible prospects to be drafted.

McMahon is a former two-time Chicago Golden Gloves boxing champion who excelled at Joliet (Ill.) Junior College prior to transferring to Central Michigan in 2007, where he sat out to fulfill transfer requirements. At an estimated 6-3, 290 pounds, McMahon started the first five games at right guard in 2008 before kicking inside to center, where he started seven of the final eight games, missing the second-to-last contest against Eastern Michigan. Academic struggles forced him to leave the program.

The silent-auction draft is scheduled to take place on July 16 by e-mail. Prospects have until July 6 to declare for the draft.

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