Final score: Bills 30, Raiders 23

Here’s an instant review of the Raiders’ 30-23 loss to the visiting — still unbeaten — Buffalo Bills on Sunday as they fell to 2-2 to close out Week 4.

Huge turnover:
With the Raiders driving and trailing 23-16 early in the fourth quarter, tight end Darren Waller lost a fumble. The Bills quickly took advantage and turned it into a 14-point lead. The Bills were able to make a big defensive play the Raiders (who struggled on defense again) could not.

Another Carr fumble:
Derek Carr lost a fumble in the fourth quarter. It was his third in the past two games and the 27th of his career. He leads in NFL in lost fumbles since 2014.

Hot before the half:
The Raiders have scored right before halftime in every game. That’s a cool trend.

Tough start for rookie Robertson:
On his first play at nickel cornerback, fourth-round pick Amik Robertson gave up a 26-yard touchdown on the first drive of the game. Robertson was playing for LaMarcus Joyner, who suffered a hand injury.

Photo by Ethan Miller/Getty Images

Big leg on Carlson:
Kicker Daniel Carlson hit his third 50-yard plus field goal of the season in the first quarter to cut the Bills’ lead to 7-3.

Hot Buffalo start:
Josh Allen led the Bills down the field easily on the first two drives of the game as the Bills took a 14-3 lead early on the second quarter. The Raiders’ defense allowed 7.6 yards per play in the first quarter. The Bills converted their first five third-down attempts.

Photo by Ethan Miller/Getty Images

Touchdown negated:
A long touchdown pass from Derek Carr to receiver Nelson Agholor was erased by a Foster Moreau penalty in the second quarter. Carlson made it 14-6 later in the drive, but still, not great.

Gutsy call:
The Bills went for it on fourth downa and 1 from the 50 in the third quarter while leading by one. They got 14 yards.

Guenther in box:
After usually calling the game from the sideline, Raiders’ defensive coordinator Paul Guenther was in the press box on Sunday.

Offensive showcase:
The first punt of the game (by Buffalo) came with just over five minutes remaining in the third quarter.

What’s next:
The Raiders head to Kansas City in Week 5 in what is a huge AFC West game.