"I just want to go out there and re-assure myself of my decision," Treggs said. "Notre Dame was in my top two. I just want to make sure there wasn't something I didn't see.
"(Notre Dame assistant) coach (Mike) Dembrock actually hit me up Wednesday (on Facebook). They tell me that they were there from the start and they're not going to stop recruiting me just because I'm committed."
Treggs, who is Scout.com's fifth-rated receiver in the 2012 class, was on Notre Dame's campus for the spring game, but he was itching for a return.
But before booking the date, he cleared it with Cal coach Jeff Tedford.
"I talked to coach Tedford about that," Treggs said. "He's cool with it."
Treggs added he will take his official visit to Cal after the season, and is contemplating other trips to undisclosed schools.
"Right now those are the only two," Treggs said. "I might take some others, but those are the only two visits I know for sure."
St. John Bosco opens the season Friday against Mission Hills High (San Diego), and Treggs is hoping to improve on a junior season in which he developed into the best receiver in talent-rich southern California.
Treggs caught 56 passes for 1,010 yards and 12 touchdowns. He also made 37 tackles and intercepted four passes playing in the secondary.
"I've been working hard at all the camps, working on my game," said Treggs, who entered the summer as Scout.com's 12-ranked receiver. "Hopefully, it will pay off for the season, where it matters."
Part of his summer workouts included tutelage by former USC and NFL star receiver Keyshawn Johnson.
"I think I got faster, and I think my releases off the line got a lot better because I'm more physical off the line now," Treggs said. "It came from working with Keyshawn."