ORCHARD PARK, N.Y. — The Bills lost their home opener to the Los Angeles Chargers, 31-20, Sunday, but they also lost a player as cornerback Vontae Davis seemingly retired at halftime.

Davis released a statement, explaining why he quit when he did. The Bills were down 28-6 at halftime when Davis decided to call if a career.

That decision was not appreciated by his teammates.

Davis started the game for the Bills and was credited with one tackle in the contest. He's a 10-year veteran who signed a one year contract with Buffalo this past offseason.

Despite Davis quitting on the team, the rest of the roster didn't quit on the game. In fact, the Bills outscored the Chargers 14-3 in the second half, highlighted by rookie quarterback Josh Allen's first career touchdown pass in his first career start. Something his parents loved to see from the front row at New Era Field.

However, the rookie also displayed some rookie struggles. He completed 18 of his 33 pass attempts for 245 yards with the one touchdown and two interceptions — giving Allen a low QB rating of 16.1. Compared to last week's abysmal offensive performance in a 47-3 loss to the Baltimore Ravens, it was an improvement, but the team, and Allen, still have a long way to go.

"You know I got to be better with the pass protection, I got to be better with getting the ball out quicker and ultimately taking care of the football," Allen said. "The two interceptions were just two plays that I could have changed." 

The offensive line struggles continued as well. Allen was sacked five times for a loss of 36 total yards.

Another cause for Bills concern is running back after LeSean McCoy missed the entire fourth quarter with what the team called a rib injury. McCoy was shaken up late in the third quarter when he was tackled from behind and had Buffalo center Ryan Groy fall down on him. Groy landed heavily on the left side of McCoy's chest as he was on the ground.

The Bills defense played much better in the second half, despite losing their starting cornerback to a mid-game retirement, but the first half deficit was too much to overcome. The Chargers had more total yards (349-293), won the turnover battle (2-0) and had more time of possession (33:02-26:58).

The Bills are now 0-2 with a tough road game coming up on Sunday when they travel to Minnesota to take on the Vikings.