Michael Roos has played in 148 games for the Titans, but on Wednesday the veteran left tackle learned his season is over. His career in Tennessee could be finished as well. The 10th-year pro needs season-ending surgery on his right knee, according to a source familiar with the situation. Rookie Taylor Lewan will replace Roos in the lineup beginning with Sunday's game against the Jagaurs (0-5) at LP Field (noon, WTVF-5, 104.5-FM). Roos played all 68 offensive snaps last Sunday against the Browns, but he's not sure when he was injured. He began to feel discomfort later Sunday and on Monday, when he saw doctors. He had a brace on his right knee as he watched Wednesday's practice, but declined to discuss specifics of the injury. Roos, a second-round pick in 2005, has missed just one game during his career, and that was because of an emergency appendectomy in 2012.