p]:text-cms-story-body-color-text clearfix”> DJ Uiagalelei holds the ball up for a pass.

Chargers quarterback DJ Uiagalelei passes against the 49ers in the first half Saturday.

(Eakin Howard / Associated Press)

There were some dramatic swings for rookie quarterback DJ Uiagalelei. At times he was poised and precise, and had a nice touchdown pass to Oronde Gadsden II. He also misfired on a pass that wound up squarely in the hands of blitzing linebacker Curtis Robinson, who returned the interception 32 yards for a touchdown.

On that play, Uiagalelei was unable to get the ball to receiver Brenden Rice, son of 49ers Hall of Fame receiver Jerry Rice.

“It would have been great to see him get a big catch and run here, in the city where his dad was such a legend,” Harbaugh said. “DJ didn’t quite see it, came off to the checkdown, and didn’t see the defender either.

“Still, there are so many learnable things from that. Teachable moments. That’s what you want for young players.”

Uiagalelei, a former standout from St. John Bosco and onetime USA Today High School Offensive Player of the Year, bounced around in college from Clemson to Oregon State and Florida State, starting at all three schools.