Alker had an 11-under 133 total at Grand Bear Golf Club, the first-year venue after the previous 10 editions were played at Fallen Oak.
“I just kind of dialed in my irons early on and took advantage of the par-5s, and obviously putted better,” Alker said. “You always putt well when you shoot 62. I just gave myself a lot of chances. Seemed like I was inside kind of 10 feet, 12 feet a lot today and I made some nice up-and-downs at the end.”
The 50-year-old from New Zealand won the TimberTech Championship in November for his lone PGA Tour Champions victory.
“I know I’ve got to keep the pedal to the metal and just keep going,” Alker said. “As I said, I just dialed in my wedges and hit some close shots early on. That’s the key out here. You’ve just got to keep hammering away.”
The 56-year-old Estes had a 64. He’s winless on the 50-and-over tour.
“It would mean a lot,” Estes said. “I haven’t won a tournament since 2002 at the Kemper on the PGA Tour. … I’ve been through a lot. I’ve worked hard for the most part on my game, equipment, training, stuff like that. I’m just enjoying hitting more quality shots and putting better, too.”