Wiebe can become the 12th player in Champions Tour history to make his debut a winning one. The last golfer to do so was Mark McNulty at the 2004 Outback Steakhouse Pro-Am.
Dana Quigley, the 2005 Champions Tour Player of the Year, birdied the last hole for a 66 and is tied for second place with Dick Mast (65) at 12-under 132.
Wiebe, a two-time winner on the PGA Tour, began the second round tied for the lead with Q School medalist Boonchu Ruangkit. He birdied four in a row from the second hole to move into the lead alone.