The Buffalo Bills opened their 2024 campaign with a 34-28 comeback win over the Arizona Cardinals in Week 1.

Statistics will help determine who played well or not, and so will the eye test. But, let’s take it a little bit further with some help from the analytics folks at Pro Football Focus.

Using PFF grades from Week 1, here are the five lowest-graded players from the Bills (1-0) defense against the Cardinals (0-1):

5. DeWayne Carter

ORCHARD PARK, NEW YORK – AUGUST 10: DeWayne Carter #90 of the Buffalo Bills gestures to the crowd following a preseason game against the Chicago Bears at Highmark Stadium on August 10, 2024 in Orchard Park, New York. The Bears won 33-6. (Photo by Rich Barnes/Getty Images)

PFF grade: 47.5.

4. Casey Toohill

ORCHARD PARK, NEW YORK – JUNE 11: Casey Toohill #99 and AJ Epenesa #57 of the Buffalo Bills walk off the field after Buffalo Bills mandatory mini camp on June 11, 2024 in Orchard Park, New York. (Photo by Bryan M. Bennett/Getty Images)

PFF grade: 42.2.

3. Ed Oliver

ORCHARD PARK, NEW YORK – DECEMBER 31: Ed Oliver #91 of the Buffalo Bills celebrates a first quarter sack during a game against the New England Patriots at Highmark Stadium on December 31, 2023 in Orchard Park, New York. (Photo by Timothy T Ludwig/Getty Images)

PFF grade: 40.4.

2. Terrel Bernard

PHILADELPHIA, PENNSYLVANIA – NOVEMBER 26: Terrel Bernard #43 of the Buffalo Bills returns an interception during the second quarter against the Philadelphia Eagles at Lincoln Financial Field on November 26, 2023 in Philadelphia, Pennsylvania. (Photo by Mitchell Leff/Getty Images)

PFF grade: 37.2.

1. Ja’Marcus Ingram

Sep 8, 2024; Orchard Park, New York, USA; Buffalo Bills cornerback Ja’Marcus Ingram (46) breaks up a pass intended for Arizona Cardinals wide receiver Greg Dortch (4) on fourth down to effectively end the game at Highmark Stadium. Mandatory Credit: Mark Konezny-Imagn Images

PFF grade: 35.8.