Thomas was injured in the first half. Coach Jim Zorn said the 11-year veteran will be evaluated Monday, but quarterback Jason Campbell and other players spoke as if the team will have to rely on other linemen for the foreseeable future. Linebacker Rocky McIntosh said via Twitter that Thomas was lost for the season with a torn triceps.
"Other guys have to step up," Campbell said.
Thomas was replaced by third-year player Will Montgomery. Thomas sat dejected on the sideline after his injury and declined to comment afterward.
Thomas tore his left triceps in 2007 and played in only three games that season. Earlier this year, he underwent knee and neck surgeries. The neck operation was considered career-threatening, while the knee surgery had coaches during training camp concerned as to whether he could play a 16-game schedule.
No. 2 overall draft pick Smith left in the second quarter with a knee injury and did not return. Coach Steve Spagnuolo said Smith will undergo an MRI; the coach gave no estimate as to how long Smith could be out.
Rams center Jason Brown left the game late in the first quarter with a MCL injury in his right knee, but he returned in the second quarter.