Carlos Santana has canceled some of his upcoming tour dates to undergo a “corrective procedure” for his back.

The news coincides with a contentious performance by the Grammy-winning guitarist at the Shoreline Amphitheatre in Mountain View on Tuesday, Aug. 27, during which the 77-year-old Rock & Roll Hall of Fame musician who was an integral part of the San Francisco music scene criticized the hometown crowd for its lack of energy. 

“We go around the world. And around the world, they’re freaking out, they know how to party. They know how to get crazy,” Santana told the crowd of 17,000. “Right here at home, it feels like we’re at the home. The old people’s house

He urged, “We ain’t having it. You got some energy and we want it. Go Santana banana f—ing crazy, man

Santana, known for classics like “Black Magic Woman,” “Evil Ways” and “Smooth,” delivered a nearly two-hour performance front-loaded with his greatest hits and heavy with solos after co-headliners Counting Crows performed their full set, according to a San Jose Mercury News concert review.

He performed seated for much of the show, likely due to his persistent back issues.

Santana also shared his thoughts on the current political climate during the show

We’re living in times where we have to come together,” He told the crowd. “Some people say there is a right wing or a left wing. It’s still the same bird.” Santana added, “We have the capacity to dismantle what is happening with Korea, Russia and China. Somehow, these people want nuclear war. And we’re, like, ‘No, no, no, no.’ We’re too evolved for that s––.”

As a result of his upcoming medical procedure, Santana has canceled shows in Phoenix and Albuquerque as well as a portion of his residency at the House of Blues Las Vegas. Ticketmaster will automatically refund tickets for these dates.

Despite these cancellations, Santana still planned to perform in San Diego on Friday, Aug. 30, and at the Fool in Love festival near Los Angeles on Saturday, Aug. 31. 

“Carlos looks forward to seeing everyone post-procedure,” said a statement from his representatives posted Tuesday on social media, noting his return to the stage is expected to be at the House of Blues Las Vegas on Oct. 30.