The Cowboys offensive line depth took a hit Friday with the news that swing tackle Chaz Green will miss the rest of the year after undergoing surgery on his herniated disc.

OL Chaz Green will undergo surgery later today on his back and is out for the year. — Charean Williams (@NFLCharean) December 16, 2016

The surgery will put Green on injured reserve and subsequently open a roster spot. Green was a surprise selection in 2015 draft’s third round out of the University of Florida. He missed several games as a sophomore and his entire junior season due to injuries.

Green wasn’t right in his offseason work leading up to his rookie year and had hip surgery in June that kept him from making his debut until 2016. This season, he started two games in place of All-Pro left tackle Tyron Smith and acquitted himself nicely until injuring his foot in a game against the San Francisco 49ers. Right when it seemed he was ready to return to active duty, this recent back ailment popped up.

The Cowboys have second-year pro Emmett Clearly out of Boston College on the roster and he’s appeared in multiple games, though Dallas has chosen to use Joe Looney as the sixth-defensive linemen on the field in recent weeks.

The Cowboys likely hoped Green was going to be their right tackle of the future. Current RT Doug Free will be in the final year of his deal in 2017. With the injuries steady piling up, it’s difficult to think Dallas enters the offseason without looking to make a move at the position in either free agency or the draft.

As of this time, there is no word on how Dallas will fill the roster spot. The club released sixth-round pick Darius Jackson earlier in the week to make room for Darren McFadden. Jackson was quickly snatched up off the waiver wire by Cleveland, with several teams putting in claims.