Las Vegas Raiders quarterback Jimmy Garoppolo has been ruled out for the remainder of Sunday's game against the New England Patriots after suffering a back injury, the team announced.

Per Grant Gordon of NFL.com, Garoppolo was transported to the hospital. Raiders coach Josh McDaniels said after the game, via Pro Football Talk's Josh Alper, that they were "just doing tests" on the quarterback.

According to ESPN's Adam Schefter (via ESPN's Paul Gutierrez), Garoppolo underwent "precautionary tests" to "err on the side of caution."

Veteran backup Brian Hoyer entered the game in Garoppolo's place.

Prior to his exit, Garoppolo had completed 14-of-22 passes for 162 yards, a touchdown and an interception.

Garoppolo was forced to miss the Raiders' Week 4 loss to the Los Angeles Chargers due to a concussion that he suffered in the previous week against the Pittsburgh Steelers. Rookie quarterback Aidan O'Connell started in his place and threw for 238 yards and an interception on 24-of-39 passing while also adding a rushing touchdown.

Prior to the injury, Garoppolo struggled slightly to start the 2023 season. He entered Sunday's game with 917 yards, six touchdowns and a league-high seven interceptions.

Garoppolo signed with Las Vegas on a three-year, $72.75 million deal this offseason after spending the last six seasons with the San Francisco 49ers. He still needed surgery on his left foot at the time, but the Raiders decided to sign him anyway.

However, the 31-year-old has not always been available to play for his team. The game against the Chargers was the 17th regular-season or playoff contest he's missed due to injury since the 2020 season.