Raymond Floyd and his son, Raymond Jr., finished in a tie for third at 10-under-par 62 alongside Dave and Ron Stockton and Johnny and John Miller, Jr.
The Stadlers torched the front nine of the Ocean Club Golf Course at Atlantis Resort and made the turn at 8-under in the scramble format. They cooled down early on the inward half but ran home four straight birdies starting at the 15th to take the clubhouse lead.
'I just dug my spurs in and rode him hard,' Craig Stadler said of his son Kevin, who almost had an eagle at the par-four 15th.
The Irwins also made a late push to take their share of first. Steve Irwin drained the tieing putt, a five-footer at the last, to give his team a share of the top spot.
'Except for the second hole, we didn't have a putt longer than 10 feet, and he was making all of them,' said Hale Irwin, the all-time winner on the Champions Tour, of his son Steve.
Hubert and Myatt Green finished alone in sixth after a round of 63. Tom Weiskopf, who designed the course, and son Eric were one shot further back at 8-under-par 64 alongside Tom and David Kite and Gary and Wayne Player.
Jack and Jack Nicklaus II finished alongside Bob and David Charles at 7-under-par 65.
Bernhard Langer and 12-year-old son Stefan were part of a group at 6-under-par 66.
This event features fathers and sons competing in a two-day scramble tournament.
Scores from the Father-Son Challenge