The San Francisco 49ers feared quarterback Jimmy Garoppolo suffered a torn ACL on Sunday, and unfortunately, they were right.
The 49ers announced that Garoppolo underwent an MRI Monday morning that determined he suffered a torn left ACL.
That will end Garoppolo's season after just three games.
Garoppolo, who signed a five-year, $137.5 million deal with the team in March, was injured in the fourth quarter of Sunday's 38-27 loss to the Kansas City Chiefs.
Backup quarterback C.J. Beathard will become the team's starter for the remainder of the season. He started five games for the 49ers last season, and the team went 1-4 in those starts.
--Cleveland Browns rookie quarterback Baker Mayfield was named as the starter for the team's Week 4 game against the Oakland Raiders, coach Hue Jackson announced.
Jackson made the announcement after meeting with both Mayfield and fellow quarterback Tyrod Taylor.
Mayfield, who was selected with the top overall pick in 2018, relieved an injured Taylor and helped Cleveland erase a 14-point deficit in Thursday's 21-17 victory over the New York Jets. The win was the first for the Browns (1-1-1) since they defeated the then-San Diego Chargers on Dec. 24, 2016.
--Rookie Josh Rosen has been named the Arizona Cardinals' starting quarterback for Sunday's game against the Seahawks in Seattle, Cardinals head coach Steve Wilks announced.
Rosen will replace veteran Sam Bradford as the Cardinals' starter.
Rosen had his first action in a regular season game on Sunday when he entered the contest after the Chicago Bears took a 16-14 lead with 4:31 left in the game.
Rosen, the 10th overall pick in this year's draft, led the Cardinals on a drive to the Bears' 45-yard line on his first series, but the drive ended when he threw an interception on a fourth-down play.
Rosen finished 4 of 7 for 36 yards and the interception.
--The Atlanta Falcons' defense, already depleted by injury, suffered another significant blow.
Starting safety Ricardo Allen suffered a torn Achilles that will end his season, multiple media outlets reported.
Allen sustained the injury during Sunday's overtime loss to the New Orleans Saints. He has started 48 of the 49 games he has played for the Falcons, and that includes starts in the first three games this season. He had 17 total tackles and one interception this year, and he has seven interceptions for his career.
Falcons linebacker Deion Jones and safety Keanu Neal are already on injured reserve with knee injuries, and now the Falcons will be without Allen, who signed a three-year contract extension during the offseason.
--San Francisco cornerback Richard Sherman is expected to miss two to three weeks with a strained calf, multiple media outlets reported.
Sherman sustained the injury during the second quarter of Sunday's 38-27 loss to the Kansas City Chiefs.
Sherman was playing in his third game after tearing his right Achilles tendon in November.
--Los Angeles Rams cornerback Marcus Peters is expected to be sidelined two to four weeks with a strained calf, according to a published report.
NFL Network Insider Ian Rapoport reported that Peters underwent an MRI to confirm the severity of the injury.
Peters sustained the injury midway through the second quarter of Sunday's 35-23 victory over the Los Angeles Chargers.
Fellow cornerback Aqib Talib sustained an ankle injury in the third quarter. The team is still awaiting word on the severity of that injury.
--Cincinnati Bengals wide receiver A.J. Green doesn't expect to miss any additional time after injuring his groin during Sunday's game.
Green sustained the injury while attempting to make a leaping catch over the middle in the third quarter and did not return in Cincinnati's 31-21 setback to the Carolina Panthers.
Also, Bengals defensive tackle Ryan Glasgow suffered a more serious injury, and he reportedly will miss the rest of the season with an ailing knee.
He was carted to the locker room during Sunday's loss, and Ian Rapoport of NFL Media reported that an MRI on Monday morning showed that Glasgow sustained a torn ACL.
--Former Philadelphia Eagles wide receiver Tommy McDonald has died, the Pro Football Hall of Fame announced. He was 84.
The 5-foot-7, 175-pound McDonald teamed with quarterback Norm Van Brocklin to help the Eagles capture the 1960 NFL championship.
McDonald, who played for five teams in 12 seasons, ranked second in league history in touchdown catches (84), fourth in yards receiving (8,410) and sixth in receptions (495) when he retired in 1968.
A six-time Pro Bowl selection, McDonald was inducted into the Pro Football Hall of Fame in 1998.