The best center set to enter free agency this year just made it official. What's it mean for the Jaguars?
Cleveland Browns center Alex Mack voided the three years remaining on his contract and will reportedly become a free agent, according to ESPN's Adam Schefter.
Browns C Alex Mack is voiding the 3 years remaining on his contract and is set to become a free agent, per source. One more free agent OL.
— Adam Schefter (@AdamSchefter) March 2, 2016
Mack's current contract would have paid him $24 million over the next three years, but he has just the fourth-highest average salary among centers in the NFL, trailing Maurkice Pouncey ($8.