The Cowboys have converted $2MM of tackle Doug Free‘s base salary into a bonus, according to Field Yates of ESPN.com (via Twitter). The move creates $1MM in cap space for this season. 
Free, 32, was slated to hit the open market prior to the 2015 season but Dallas instead kept him with a three-year deal. That deal, which should keep him in place through the 2017 season, holds a total value of $15MM. All in all, Free has made a good chunk of money throughout his career. His previous deal was a four-year, $32MM deal with $17MM guaranteed.
From 2009-2013, Free did not miss a single regular season game. In 2014, he missed five games thanks to a foot injury. Last year, he got back to his old ways and started in every regular season contest. So far this year, his ironman streak is in tact. Through six games this year, Free is rated as the 50th best tackle in the NFL out of 78 qualified players, according to Pro Football Focus. Free has a 70.7 score for run blocking but his 50.0 rating for pass blocking leaves much to be desired. In total, he has a 66.0 overall grade for his 411 snaps (212 pass blocking, 199 run blocking).
Free is due to carry a $6.5MM cap number in 2017, the final year of his current deal. If the Cowboys were to cut him before June 1st, they could be on the hook for $1.5MM in dead money while saving $5MM.