Steve McNair had surgery on his partially torn rotator cuff on Tuesday, ending a disappointing season for the Ravens quarterback.
The Ravens placed McNair on injured reserve and signed kickoff specialist Rhys Lloyd off the practice squad.
Kyle Boller made his third straight start on Monday night and almost led the Ravens to an upset of the still undefeated New England Patriots. Heisman Trophy winner Troy Smith was the backup quarterback, a role he'll continue in for the rest of the season.
Because Boller and Smith are the only quarterbacks on the roster, the Ravens likely will sign another one this week.
It is unknown whether this will be the last season for McNair, 34, who is scheduled to make $4 million next season.
Asked last month whether McNair would ever play for the Ravens again, coach Brian Billick said, "That's a question that I really can't answer. Only time will tell that. My admiration for Steve McNair — the champion he's been, the grit, the toughness, the professionalism — is something that I will continue to value. I don't know that anybody can answer that question right now."
The long-term question is the future of McNair.
Four years removed from sharing the NFL's Most Valuable Player award, McNair slumped in a season filled with injuries and turnovers.
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McNair finished this season with more injuries (groin, back and shoulder) than touchdown passes (a career-low two).
In going 2-4 as a starter this season, he completed 133 of 205 passes for 1,113 yards and committed 11 turnovers (four interceptions and seven turnovers). He had a 73.9 quarterback rating, which is 26th in the NFL and ranks as his second lowest since 1998.
McNair began the season injuring his groin early in the opener and experienced back problems a few weeks later.
Then, during the Ravens' 21-7 loss to Cincinnati on Nov. 11, McNair partially dislocated his left shoulder and damaged his rotator cuff. He fumbled twice and threw an interception in that game, which was indicative of a mistake-filled season.
One of the NFL's most injured stars, McNair has never had to have his rotator cuff repaired. Since becoming a starting quarterback in 1997, McNair has had at least six surgeries involving (in order) his right knee, lower back, left big toe, right shoulder, left ankle and sternum.
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