Four starting quarterbacks were forced out of games on an injury-riddled Sunday afternoon in the NFL.

The Miami Dolphins¡¯ Tua Tagovailoa was carted off with a rib injury in the first quarter of Miami¡¯s 35-0 loss to the Buffalo Bills, while the Houston Texans¡¯ Tyrod Taylor left with a hamstring injury after securing a 14-7 lead over the Cleveland Browns with a 15-yard scramble to the end zone in the second quarter. The Browns rallied to win 31-21.

¡°They are getting tests done on Tua,¡± Dolphins coach Brian Flores said. ¡°We don¡¯t know the severity of the injury right now,¡±

Jacoby Brissett stepped in for Tagovailoa, who was blasted by Bills defensive end A.J. Epenesa while attempting to complete a pass on fourth down on Miami¡¯s second possession.

Tagovailoa was assisted by trainers, who helped him walk to the sideline and later loaded the second-year quarterback onto a cart to take him to the locker room. NFL Network reported X-rays were negative and described the injury as bruised ribs.

Chicago Bears¡¯ first-round pick Justin Fields took over for Andy Dalton in the second half of their 20-17 home win over the Cincinnati Bengals after the veteran quarterback appeared to suffer a knee injury.

Head coach Matt Nagy said the medical staff ruled out a torn ACL and that Dalton was available to re-enter the game if Fields was injured.

Nagy would not commit to a starter for Week 3.

¡°I¡¯m not going to get into any of that,¡± Nagy said.

Carson Wentz, meanwhile, left in the fourth quarter of the Indianapolis Colts¡¯ 27-24 loss to the Los Angeles Rams after hurting his ankle.

¡°He rolled it up pretty bad,¡± Colts coach Frank Reich said. ¡°I kind of had a sense when we walked off the field because I saw that it didn¡¯t look good,¡± . ¡°The longer we were off the field there it just stiffened up. He tried, but there was no chance.¡±

The quarterback woes were among a spate of injuries among key NFL players on Sunday.

Three-time Pro Bowl linebacker T.J. Watt left during the Pittsburgh Steelers¡¯ 26-17 loss against the Las Vegas Raiders after suffering a groin injury. The injury comes days after Watt signed a four-year contract extension worth a reported $112 million to become the league¡¯s highest-paid defensive player.

Denver Broncos linebacker Bradley Chubb and Browns wide receiver Jarvis Landry, a five-time pro bowler, also left their respective games against the Jacksonville Jaguars and Texans with injuries.