Joe Southwick saved his best game of the season for the final one on the blue.

A week after saying it was easier to play on the road, thejunior made it look easy at Bronco Stadium against Colorado State.

Southwick completed 17-of-20 passes for 216 yards and two touchdowns. He did not throw an interception and was not sacked.

It was his best completion percentage and best pass efficiency game of the season.

“Watching a lot of film, analyzing the heck out of myself from each game, I definitely see improvement from week to week,” Southwick said. “I feel like I’m getting better each week and that’s comforting. I know the offense is just going to keep getting better and better.”

His first pass went to fullback Dan Paul for 20 yards — and it kept getting better from there. Southwick completed his first six passes as the Broncos rushed out to a 21-0 lead.

“He’s seeing it all. There’s nothing you can throw at him that he hasn’t seen,” senior running back D.J. Harper said.

In the final minutes of the second quarter, Southwick connected with Matt Miller on a 5-yard touchdown pass and with Holden Huff on an 18-yard TD pass.

Southwick quarterbacked the Broncos on eight drives. Six ended with touchdowns, one on a failed fourth-down run deep in Colorado State territory and one on a punt. Boise State did not have a three-and-out with Southwick under center.

“We tried to come after them, and they did a good job of picking everything up upfront and we didn’t get a lot of pressure on them,” Colorado State coach Jim McElwain said.

The offensive line did a nice job giving Southwick time to allow receivers to run open and get to his second and third options in the pass game.

“He’s trusting the protection better, he’s working the pocket better, he’s calmer in the pocket and making throws how a quarterbacks needs to when the O-line protects for him,” coach Chris Petersen said.

Brian Murphy: 377-6444