Stewart and Reagan Cink set the pace in the first round of the PNC Championship at Ritz-Carlton Golf Club in Orlando, Florida.
The Cinks finished at 13 under Saturday, one shot better than the teams of John Daly and John Daly II and Justin and Mike Thomas.
At one point, Stewart and Reagan reeled off seven straight birdies to catapult up the leaderboard.
PGA TOUR ChampionsThat’s seven birdies in a row for Team Cink!<br><br>They lead -12 (15) <a href="https://twitter.com/PNCchampionship?ref_src=twsrc%5Etfw">@PNCchampionship</a>. <a href="https://t.co/oPHt43oZPv">pic.twitter.com/oPHt43oZPv</a>
Cink already has one victory under his belt from when he partnered with his other son, Connor, in a winning effort in 2013.