The Las Vegas Raiders have three quarterbacks on their roster, and the most established one won't be taking the field on Sunday afternoon at the Los Angeles Chargers. Jimmy Garoppolo was ruled out on Saturday after spending the week in concussion protocol, meaning the Raiders (1-2) will likely turn to 37-year-old journeyman Brian Hoyer, who backed up Garoppolo the first three games. Garoppolo was placed in concussion protocol following a 23-18 loss to the visiting Pittsburgh Steelers on Sunday night. He was listed as questionable on Friday's injury report before being ruled out one day later. Hoyer has started 40 games in his 15-year NFL career but only three since the 2017 season. He has lost his last 12 starts, previously winning in Week 4 of the 2016 season with the Chicago Bears. He made his most recent start for the New England Patriots on Oct. 2 in a 27-24 overtime loss to the Green Bay Packers but left with a head injury on the game's second series. Another option for the Raiders is 25-year-old rookie Aidan O'Connell, a fourth-round pick out of Purdue who threw 50 touchdown passes his final two seasons with the Boilermakers. "We're hard at work prepping how we manage that situation as best we can as it progresses through the week," Raiders coach Josh McDaniels said. We like the Chargers to do well here no matter what and will take them minus the points.