San Francisco 49ers defensive lineman Justin Smith is scheduled for an MRI on his left arm Monday after the injury forced him out of Sunday's dramatic 41-34 victory over the New England Patriots, according to Matt Maiocco of CSN Bay Area.
Smith was able to return for one play after going down late in the third quarter but apparently it was too painful to play with, as he was not seen on the field after that for the remainder of the game. With Smith watching from the sidelines, the Patriots rallied back from a 28-point hole to tie the game before Colin Kaepernick and company reclaimed the lead for good.
Smith did receive X-rays while he was on the sideline before reentering the game so it's pretty likely that there wasn't any major injuries to be found.
Smith has played in 188 consecutive games, which happens to be the longest-active streak in the NFL among defensive tackles, according to Maiocco. The 49ers' next opponent, the Seattle Seahawks, still have an outside chance at the division so Smith will surely do everything in his power to return for that game.