Cameron Young remains in control at the top of the Cadillac Championship leaderboard, stretching his lead to six shots after a steady round of two-under 70 to get to 15 under.
Young's lead is now over a group that includes top-ranked Scottie Scheffler ahead of a potentially rainy final round Sunday.
"The tournament's in his hands right now," said Scheffler, who shot a three-under 69 to get to nine under.
"I can go out and have a really good round, and if he has another really good round he's going to be a tough guy to catch. All I can do is go out and try and have a great round and see where that leaves me."
South Korea's Si Woo Kim (69) and Norway's Kristoffer Reitan (69) are also on nine under. Americans Ben Griffin (68) and Matt McCarty (69) and Canada's Nick Taylor (72) sit on eight under.
A lot of rain is expected on Sunday - more than an inch, according to some forecasts, with heavy downpours predicted for the afternoon - the tournament moved up its schedule for the final round in an effort to beat the worst of the weather.
Players will go off in threesomes, from split tees, with everyone starting between 7:30-9:40 a.m. It's unknown if President Donald Trump - the course owner - will publicly appear in the final round. He was expected to be at the course Sunday, though that was before the schedule for the final round changed.
Young shared the lead through three rounds at the Masters - tying for third at Augusta National after Rory McIlroy beat him by two shots.
Scheffler beat Young by five shots in that final round at the Masters. He'll need to do better than that at Doral if he's going to win on Sunday.
But the way he finished Saturday might have made his comeback chances a bit of a boost.
The 18th at Doral basically is two different holes - a brutal par 4 for those who don't have enough distance for a 300-plus-yard carry over water and into a wider portion of the fairway, and a slightly less brutal par 4 for those who can get it out there.
Scheffler is one of those who don't have problems reaching the better spots of that fairway, and he took full advantage of that on Saturday.
His approach from 172 yards stopped 4 feet from the cup. He made the birdie - just the ninth of the week at the finishing hole.
"Just ended up in a good spot and really nice 9-iron in there to finish off," Scheffler said. "It's always nice to have a little tap in at the last."
Young actually had a closer approach on the 18th, but his shot from about 165 yards was 60 feet below the hole. His birdie putt was about eight feet short, but he saved the par to preserve the six-shot edge.
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