UPDATE: He’s been waived by the Rams, now. 

In 2014-era Roger Saffold fashion, the player the Rams claimed off waivers is no longer on the team, due to a failed physical. There is no official reason why he failed the physical, but Jackson has a poor history with knee health.

The Los Angeles Rams added to their shallow depth at offensive line by claiming a guard off the waivers, according to Field Yates.

Tre Jackson will be the third veteran lineman to join the Rams under Sean McVay. Jackson was a fourth-round draft pick by the New England Patriots in 2015 and was an immediate starter for the AFC East squad.

Jackson will join a Rams offensive line that is seeing a reverse youth movement. The squad has seen additions of two veterans expected to make immediate starts at their position. While it’s uncertain whether or not Jackson will be expected of that much, he joins vets Andrew Whitworth (tackle) and John Sullivan (center).

Jackson was one of the best pass-blocking guards from the ACC, according to ProFootballFocus. Coming from Florida State, Jackson earned All-American honors his final year with the Seminoles and earned All-ACC his final two years. After being selected by the Patriots in 2015, Jackson made nine starts in 13 games appearances.

ProFootballFocus gradeded him positively through four consecutive games after making a rough go in the early starts. In almost 400 snaps at guard, Jackson surrendered only 24 quarterback pressures. He finished the season with a knee injury, however, that sidelined him through the 2016 season. The knee injury was reportedly a reoccurring annoyance for Jackson during his rookie campaign.

After just two years with the Patriots, he was waived and later claimed by the Rams.

The hope is that Jackson can remain healthy and serve as a reliable back-up should Saffold or Havenstein, the projected starters at guard, fall to injury. Although he is the projected starter, Havenstein’s spot at guard is not guaranteed. It will be a new position for him, having been a tackle throughout his college and professional career. A healthy Jackson could steal the position away from Havenstein.

But Jackson will walk before he runs. Come training camp, barring any further issues, Jackson will be more than a year removed from his knee injury. When he comes back to the field to take live reps, hopefully there will not be too much rust on him.