The 51-year-old Mickelson won the PGA Championship in May at Kiawah Island for his 45th PGA Tour title and sixth major championship. Last year, he opened his senior career with consecutive victories in Missouri and Virginia. Lefty tied for 20th in Tucson, Arizona, in February in his lone Champions event this year.
“I like the fact that it’s 54 holes,” Mickelson said. “It’s not anywhere near as mentally and physically draining as the regular tour and you don’t have to be as perfect as on the PGA Tour because the penalty for miss is so much greater there.”
Gogel birdied the last two holes. Playing his first Champions season, the 50-year-old Gogel won at Pebble Beach in 2002 for his lone PGA Tour title.
Frank Lickliter II and Cameron Beckman were tied for third at 67. Charles Schwab Cup leader Bernhard Langer was at 68 with Darren Clarke, David Toms, Tim Herron, Kevin Sutherland, Rod Pampling, Robert Karlsson and Steven Alker.
Playing alongside Mickelson, tournament host Jim Furyk opened with a 69 and European Ryder Cup captain Padraig Harrington shot a 74 in his PGA Tour Champions debut.
Ernie Els also was at 69 with Jay Haas and Mike Weir. U.S. Ryder Cup captain Steve Stricker shot a 71 in a group with Fred Couples (72) and Davis Love III (73).