LOS ANGELES -- California head coach Mike Montgomery said Friday he was diagnosed with bladder cancer and had surgery last week that has left him cancer free.

Montgomery made the surprise announcement at Pac-12 media day in Los Angeles. The school announced Montgomery’s surgery on Oct. 19, but didn’t disclose any details about it.

“I went from having high-grade bladder cancer to being totally cancer-free at this juncture,” he said.

The 64-year-old coach resisted going into detail about his health crisis, but he said he was diagnosed last month while a doctor was checking on diverticulitis, a condition in which the inner lining of the intestine becomes inflamed or infected.

“There was something that wasn’t supposed to be in there,” Montgomery said. “Three months ago he wouldn’t have found it. Six months from now, you would have been done. If you’ve got an ache or a pain, get checked.

“Through a series of extremely fortuitous events, we were able to get in, get the little polyp, tumor, whatever you want to call it, and get it out. Everything since that time has been all clear.”

Montgomery said he will return full-time to running the 24th-ranked Golden Bears’ program on Monday “much to the players’ chagrin.”

Senior guard Jorge Gutierrez said the team feels more connected to Montgomery since learning of his condition.

“He opened up a little bit more, so that helps us to relate to him more,” he said.

Montgomery said he’s lost weight and is focused on regaining his strength, but has no physical limitations. He was relatively blithe in telling the media about the experience and only briefly turned serious on the subject.

“It’s scary,” he said. “You go from being relatively on top of your game to no longer being in charge. I’m extremely fortunate it went the way it did. Probably adds a little perspective to your life.”

Southern California coach Kevin O’Neill was aware of Montgomery’s condition.

“It’s great to see him healthy. When he was doing surgery, he was cracking jokes the whole time,” O'Neill said. “Everybody’s prayers are with Mike. Not a more respected coach in the whole country, not a guy that’s done a better job at so many levels in the whole country.”

Montgomery enters his fourth season at Cal, which was picked to finish second to UCLA in the newly realigned Pac-12. He previously coached for 18 years at Stanford, leading the Cardinal to the 1998 Final Four and being named league coach of the year four times. He left Stanford to coach the NBA’s Golden State Warriors for two seasons before returning to the college ranks, where he has 611 career wins, putting him in the top-25 among active coaches.