Garvey threw out the ceremonial first pitch Monday at Dodger Stadium, on a relay throw from first base.
Garvey, 64, the 10-time All-Star and 1974 National League most valuable player, underwent surgery to remove his prostate last October. He said his most recent test results showed him to be "virtually clear" of cancer, although he said doctors would continue to monitor him.
"I'm now a torchbearer for prostate awareness," he said.
He referred interested fans to the website septembeard.org, which is a fundraising site for prostate cancer research.
Garvey worked in community relations for former owner Frank McCourt. He saluted Guggenheim Baseball Partners, the new owners, for restoring the sparkle to a team bought out of Bankruptcy Court last year.
"I'm very proud of them," Garvey said. "They've done an exceptional job. They've laid a great foundation for the future."