Scout.com's No. 9 middle linebacker actually visited UCLA officially on Jan. 8 and was originally planning to visit USC on Jan. 29, but has since cancelled that trip.
He visited Stanford on Jan. 15 and said he had "a great time."
The big question is whether or not Zumwalt actually plans on signing with the Cardinal next week. "I'm still committed to Stanford right now, but I'm not saying anything more about that," he said.
Zumwalt says he doesn't plan on answering any questions relating to his commitment, but did admit that "it's between Stanford and UCLA."
Although he no longer plans to take an official visit to USC this coming weekend, he said he did receive an in-home visit from new USC recruiting coordinator Ed Orgeron and defensive coordinator Monte Kiffin on Tuesday, Jan. 26.
"They are still recruiting me," Zumwalt said. "They had a lot of good things to say about USC and how I could fit into their defense."
"I don't want to talk about that," said Zumwalt when asked if the Trojans in-home visit helped their cause.
"I don't want to cause any drama and it seems like anytime I say anything about a school it turns into a big deal," he said. "So instead I'm not saying anything.
"I'd rather not talk about any of this stuff until signing day and after it's all over," he said.
Zumwalt finished his senior season with 157 tackles, two fumbles recovered, two blocked punts and one caused fumble.
He reports a 3.1 core GPA and a 23 ACT and has already been academically accepted by Stanford.