The Buccaneers and offensive lineman Ali Marpet have agreed to an extension, according to his representatives at Select Sports Group (on Twitter). It’s a five-year add-on that will keep him under contract through the 2023 season. Marpet’s extension is worth $55MM over the five-year period with $27.125MM in guarantees, a source tells Mike Garafolo of NFL.com (on Twitter). 
Marpet has been a full-time starter along the Buccaneers’ offensive line ever since being selected in the second round of the 2015 draft. A right guard during his first two years in the league, the 25-year-old Marpet transitioned in 2017, but shifted to right guard this year. Last year, Pro Football Focus graded Marpet as the NFL’s No. 6 pivot before he was placed on IR in late November. This year, PFF has him as the seventh-best guard in the NFL through five weeks.
Marpet missed three games due to injury as a rookie and five games last year, but he has been on the field for every offensive snap in 42 of the other 44 contests since his arrival in Tampa. He’s also started in all 44 of those games.
Before the new deal, the former second-round pick was scheduled to reach free agency in March. He’ll carry a tidy $1.2MM cap charge this year before getting a sizable pay bump in 2019.
Marpet’s skillset, versatility, and age would have positioned him as one of the most valuable offensive lineman in free agency next year. The Bucs were willing to pay the price in order to keep Marpet off of the open market or avoid using the pricey franchise tag to delay his free agency until 2020.
With Marpet’s deal completed, the team is expected to turn its attention to left tackle Donovan Smith, a fellow second-round pick in the 2015 draft.
Good deal.