Smith will have an MRI on his knee after getting knocked out of Sunday's game against the Ravens, according to Kimberley Martin of Newsday.
Smith, who completed four of eight passes for 95 yards and a touchdown, was forced out in the second quarter after suffering the injury while getting tackled. Ryan Fitzpatrick played fairly well, completing nine of 14 passes for 120 yards and a score, and Jets head coach Todd Bowles said he is unsure who will start when Smith is healthy again.