Doucet lined up in the right slot and cut inside. The ball arrived at the same time as Goldson, who took both of Doucet's feet off the ground with a crushing shoulder-to-shoulder hit. Doucet landed flat on his back and stayed there for several minutes.
Goldson was ejected from a game against the Cardinals last November for fighting with Doucet. The Cardinals' wide receiver was fined $10,000, while Goldson was docked $25,000 for the incident. That didn't instill any hesitation into Goldson.
"Those hits like that are game changers, and they're momentum changers," he said. "He ran a play, I read it and I just unloaded."
The entire 49ers defense unloaded on the Cardinals. Quarterback John Skelton was sacked four times and hit six times. Not a single Cardinals wideout surpassed 65 receiving yards. All-Pro Larry Fitzgerald was held to five receptions, two of which came on the game's final drive. The running game produced 7 yards on nine attempts.
This is the Arizona team we expected when the season started. That 4-0 start began to change minds as the defense played like one of the top units in the NFL. Things went back to normal during the ensuing 0-4 run. The Cardinals' offense can't do enough to win until the offensive line begins to play much better.
Follow Kareem Copeland on Twitter @kareemcopeland.