GLENDALE, Ariz. (AP) -- Arizona rookie David Johnson rushed for 66 yards in 13 carries in his NFL debut, San Diego had six first-half sacks, and rookie Josh Lambo kicked a 42-yard field goal as the game ended to give the Chargers a 22-19 preseason victory over the Cardinals on Saturday night.
Johnson, a fourth-round pick from Northern Iowa who had been out most of training camp with a hamstring injury, also caught two passes for 15 yards.
Melvin Ingram sacked Carson Palmer twice.
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Palmer, playing less than one quarter, completed a 57-yard pass to rookie speedster J.J. Nelson to set up his 17-yard TD pass to John Brown.
San Diego quarterback Philip Rivers sat out the game.
Rookie quarterback Phillip Sims directed the Cardinals to 10 fourth-quarter points to tie it at 19 before Lambo won it.