The Lions aren't taking any chances on being caught short at tackle while Taylor Decker recovers from surgery that will sideline him for at least the beginning of the 2017 season.
The Lions could use Robinson as a temporary left tackle whom they could release before the regular season starts if he continues to struggle. He played in 12 games, with two starts, in 2015.
The Lions are hoping that Robinson could finally show his potential with a change in scenery.
Asked after Wednesday's practice about Robinson, McVay said he "seen good things at times", and that Robinson still had a role on the team as the offseason program concluded. "We wish him the best as he embarks on this new chapter".
By trading Robinson, the Rams save $3.2 million on their salary cap. That kind of cap hit implies the move was made with a vision of Robinson contributing.
To make room on the roster for Thursday's additions, the Lions released long snapper Jimmy Landes, who was a sixth-round draft pick by Detroit in 2016, and offensive tackle Arturo Uzdavinis, who spent past year on the practice squad for the Jacksonville Jaguars.
Maybe Robinson, still just 24, will benefit from having new coordinators, and as one of the worst run-blocking tackles in the NFL, he seems a decent fit for the Lions, who called the fewest rushes of any team in the league past year.
"We're trying to get better as quickly as we possibly can".
In his five starts, Kouandjio played every offensive snap for the Bills at left offensive tackle. I just think it's going to be a situation where we're going to improve.