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What to watch for: Chargers at Cardinals

Three keys for the San Diego Chargers in their preseason game at Arizona on Saturday night. Kickoff is set for 10 p.m. ET:

Clean up the slop: After looking pretty good in the preseason opener, San Diego was very sloppy at Chicago. They made countless mistakes on offense and looked far from being ready. With the starters playing much of the game, the Chargers must clean up their act.

Offensive line: One of the biggest issues for the slop was terrible offensive line play, especially in pass protection. Philip Rivers needs some time.

Special teams: San Diego’s special teams was putrid at Chicago. It was awful in every phase. This unit needs to get its act together.