Mason played college football at Georgia Tech from 2011 to 2014[1] and was selected by the New England Patriots in the fourth round of the 2015 NFL draft.

[5] Mason broke his hand during the 2016 preseason and did not start in the season opener against the Arizona Cardinals but split time at right guard with rookie Ted Karras.

He started in Super Bowl LII, but gave up the strip sack that ultimately proved to be the biggest play of the game.

[9] Mason played every offensive snap in Super Bowl LIII and the Patriots defeated the Los Angeles Rams 13–3.

[12] On March 15, 2022, Mason was traded to the Tampa Bay Buccaneers in exchange for a fifth round pick in the 2022 NFL draft.