The Chicago Bears defeated the Kansas City Chiefs, 29-27, in comeback fashion Friday night at Arrowhead. It marked Chicago’s preseason finale where their starters saw action in the first half.

Both the starting offense and defense struggled from the jump against the Chiefs starters. The Bears defense was completely dominated by Patrick Mahomes and the Chiefs offense, where they scored 17 points in three series of action. Chicago’s pass rush was completely nonexistent and Mahomes made them pay while the defensive backfield was sorely missing cornerbacks Jaylon Johnson and Kyler Gordon.

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Meanwhile, it wasn’t much better for Caleb Williams and the starting offense, whose first series consisted of a botched snap and handoff, a false start, a throwaway and a completion short of the sticks. The Bears had back-to-back three and outs. And, on their best possession where they finally saw the red zone, they had to settle for a field goal. But Williams was able to connect with Rome Odunze during the two-minute drill for their first touchdown.

Here’s a look at the best and worst from the Bears offense and defense following Friday’s preseason win.

Best offense grades

WR Olamide Zaccheaus – 73.6

WR Maurice Alexander – 72.3

Best defense grades

DT Andrew Billings – 62.6

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Worst offense grades

TE Colston Loveland – 47.2

WR Luther Burden III – 59.5

Worst defense grades

DT Gervon Dexter Sr. – 42.2

CB Tyrique Stevenson – 49.6

This article originally appeared on Bears Wire: Bears PFF grades: Best and worst performers in preseason win vs Chiefs