BALTIMORE (AP) - The Baltimore Ravens won the game and lost their quarterback.
Joe Flacco tore ligaments in his left knee during the closing seconds of a 16-13 victory over the St. Louis Rams on Sunday.
"He tore at least his ACL and maybe his MCL as well," coach John Harbaugh said.
The Ravens also lost running back Justin Forsett, who broke both bones in his right forearm.
Justin Tucker kicked a 47-yard field goal as time expired to end a mistake-filled game in which the Ravens rallied from a 10-point deficit.
One final miscue decided the issue: Rams quarterback Case Keenum fumbled when hit by Courtney Upshaw, and teammate Lawrence Guy recovered at the St. Louis 41 with 54 seconds to go.
Flacco moved the Ravens (3-7) to the 29 - injuring his knee along the way - before Tucker delivered the game-winning kick.
St. Louis (4-6) lost four fumbles and missed an extra point. In his first start of the season, Keenum went 12 for 26 for 136 yards and fumbled three times, losing two.
Baltimore won despite committing two turnovers and being penalized 10 times for 137 yards. The Ravens have lost seven games by a total of 32 points, but this close one went their way.
They trailed 13-3 before coming back behind Flacco, who went 27 for 44 for 299 yards and a score.
Both teams had a chance to win in the closing minutes of regulation. After Greg Zuerlein missed a 52-yard field goal with 1:41 remaining for the Rams, Tucker was wide right on a 51-yarder with 1:13 to go.
Keenum's pivotal fumble followed.
Keenum was selected as the Rams' starter on Monday, replacing Nick Foles in a move that coach Jeff Fisher said was designed to bolster the offense. The switch did not pay immediate dividends.
The Ravens appeared to be doomed by their own mistakes until Rams running back Todd Gurley lost a fumble at the St. Louis 42. Flacco directed a seven-play drive that ended with a 3-yard touchdown pass to Kamar Aiken with 11:11 remaining.
A 20-yard field goal by Tucker tied it with 5:12 to go. The kick capped a 76-yard drive, highlighted by a 46-yard completion to Crockett Gillmore.
The Ravens played the majority of the game without Forsett, who left in the first quarter after being driven to the turf by Aaron Donald for a 5-yard loss.
Rookie Javorius Allen took over and finished with 67 yards on 22 carries.
One sequence in the third quarter summed up the struggle each team experienced trying to generate offense. Keenum and Gurley failed to execute a handoff, resulting in a Baltimore fumble recovery. Flacco gave it back with a poor pass that was intercepted by Trumaine Johnson and returned to the Baltimore 49.
Three plays later, Keenum threw a 30-yard touchdown pass to Lance Kendricks for a 13-3 lead.
Keenum went 3 for 10 for 31 yards in the first half, yet the Rams led 7-3 despite accumulating a meager 74 yards of offense.
Baltimore made a variety of mistakes before the break, most notably an interception by Flacco and six penalties totaling 107 yards.
The Ravens were flagged for roughing the quarterback on a third-down incompletion, offensive pass interference on a 26-yard gain and unnecessary roughness on a punt return.
And there was this: A 49-yard penalty for pass interference against cornerback Jimmy Smith led to a 1-yard touchdown run for Gurley and a 7-0 lead.
Baltimore's only first-half points came after Tavon Austin fumbled a punt to set up a 25-yard field goal.
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