"USC's Junior Day was great," said Mahalak. "They have a beautiful campus and the facilities are awesome."
Mahalak met with offensive coordinator Clay Helton and head coach Lane Kiffin too, to get an idea of where he stood on their quarterback board.
"Coach Kiffin said he would be sending Coach Helton to come see me, and Coach Helton said he would be coming up in the spring to watch me throw," said Mahalak. "And they also said they would like me to come to maybe a day of their camp. If I throw well, then there is a legit chance they have an offer on the table. They were straight forward with me."
Mahalak said his conversation with Helton went well.
"I really connected with Coach Helton, and I could definitely see myself playing there," said Mahalak.
On Saturday, Mahalak got a chance to visit UCLA unofficially.
"I'd been there once before, but this time we got to meet with Coach (Taylor) Mazzone and we sat down in his office and watched some video," said Mahalak. "He said the one thing that caught him off guard was my size and that they really liked my size."
Like USC, Mahalak said that UCLA wants to see him during the eval period.
"They said the same thing, they're going to come see me throw in the spring," said Mahalak.
"Coach (Angus) McClure has before but either Coach Mazzone will come this spring." Mahalak said he gave the edge on the campuses to USC.
"I have to give the edge to USC on the campus," said Mahalak. "They were both beautiful, but USC's was a nice and flat campus."
Mahalak, who backed up Cal-bound Jared Goff as a sophomore and junior, said that coaches at USC and UCLA were aware of his situation and being set for his first season as the starter.
Still, they spent time this past fall watching him throw, and South Alabama has already offered him.
And other schools will likely get unofficial visits from him this spring.
Cal, with Goff now on campus, hasn't been in communication much with Mahalak, but their Bay Area neighbor, Stanford has.
This spring, he'll be at the Elite 11 in the Bay Area, the Bay Area NFTC and Passing Down 7on7.