Utah officials are researching to see if any other player has accomplished the feat by contacting schools which have players with more than one return in a game.
So far the inquiries have failed to find any players who have duplicated Dunn's feat.
Dunn, who had one return in the first quarter then another in the fourth, said he went into Saturday's game with the intent of 'making something happen.'
"Coach [Jay] Hill always tells us to give short fields to the offenses and we can make something happen if we get past the 50," Dunn said. "But it was just me as a senior, I feel like it's real important for me to step up in my last year and make some plays for special teams and the team."
Utah coach Kyle Whittingham said Dunn's returns came at ideal times, just when Cal was starting to gain momentum.
"It was a big lift for us," he said.
The other Pac-12 athletes of the Week were USC receiver Marqise Lee and Arizona linebacker Marquis Flowers.
Lee set a Pac-12 record with 345 receiving yards in 16 catches in USC's loss to Arizona and Flowers had three takeaways and seven total tackles.
Whittingham regards Washington State coach Mike Leach as one of his closest friends in the coaching ranks. The two often spend time together when Leach is in town visiting his wife's family.
"I have a lot of respect for him as a football coach," Whittingham said. "The guy knows the passing game as well as anybody in the country."
The Utes have 500 tickets available for Saturday's game since Washington State returned some of its allotment...Senior defensive tackle Star Lotulelei has been named one of 16 semifinalists for the Chuck Bednarik Award, which goes to the nation's Defensive Player of the Year.