SAN DIEGO — Jamaal Williams and the BYU Cougars are a good fit in San Diego bowl games.

Once a staple of the Holiday Bowl, the Cougars won their second Poinsettia Bowl on a rainy Wednesday night thanks mostly to Williams.

The senior gained 210 yards on 26 carries and scored once, and Tanner Mangum ran for a touchdown and threw for another to lead BYU to a 24-21 victory over Wyoming.

It was the sixth 100-yard game for Williams this year and the second time he gained more than 200. He ran for a career-best 286 against Toledo.

With BYU (9-4) leading 17-7, Williams gave the Cougars some breathing room when he broke a 36-yard scoring run early in the fourth quarter. That TD was set up by Dayan Lake’s interception of Josh Allen. The interception came one play after BYU’s Micah Hannemann was ejected for targeting after a helmet-to-helmet hit on the sliding Allen.

Williams is BYU’s career leader with 3,901 yards rushing. He also scored a touchdown in the Cougars’ 23-6 Poinsettia Bowl victory against San Diego State in 2012.

“It felt like almost the same because I scored in both of them,” Williams said. “It just brings back a whole bunch of memories, and in the same end zone, too. It just brought back a whole bunch of memories of my freshman year, but I was still in the game.”

He praised his blockers, particularly wide receiver Jonah Trinnaman, for springing him on his scoring run.

“Honestly it was just great offensive line blocking and the tight ends and Jonah. Jonah is the man,” Williams said. “That man had the best block in the world. I wanted to celebrate right there before I even scored.”

Williams fell short of the Poinsettia Bowl record of 228 yards by San Diego State’s Ronnie Hillman in 2010.

Wyoming, which lost to San Diego State in the Mountain West Conference championship game Dec. 3, finished 8-6.

“It was a play or two here or there,” coach Craig Bohl said. “To go from two wins last year to where we are now, it’s been a change of culture.”

Brian Hill, who ran for 1,767 yards this season, didn’t play the first quarter.

“That was my decision and that is all I’m going to say,” Bohl said.