"He's going through a tough time," left tackle Duane Brown said. "I've been here with him my whole career and I don't know if he's ever been in a moment like this, but I think he's mentally strong enough to get out of it."
In a stadium set to be destroyed after the season, Schaub himself imploded. He could be seen muttering to himself with a shocked expression walking off the field as Kubiak buried his face in his hands.
With Schaub struggling, San Francisco's offense didn't need to do much.
Colin Kaepernick tossed a 64-yard touchdown pass to Vernon Davis and Frank Gore ran for 81 yards and a score. The 49ers (3-2) are right back in the NFC West race after the Seahawks (4-1) lost at Indianapolis.
Anthony Dixon added a 2-yard touchdown run for the NFC champions, while Brock had a second interception and nearly a third.
Kaepernick went 6 for 15 with 113 yards as the 49ers won their second straight in emphatic fashion following the first two-game losing streak under third-year coach Jim Harbaugh. Kaepernick completed four of his first six passes, then threw seven straight incompletions before connecting with Bruce Miller early in the fourth quarter and then Davis' TD.
Brock and the ball-hawking defense was a big reason why.
He recorded his first career pick six, then gained 13 yards on his second interception midway through the second quarter. That set up Dixon's second TD of the year.
Brock nearly had a third late in the first half but was called for defensive pass interference, and rookie safety Eric Reid dropped a would-be interception right at him late in the third.
Even fringe defensive lineman Tony Jerod-Eddie — an injury replacement for Ray McDonald — got in on the interception fun in the third quarter.