He came up 7 feet short on his first putt but rammed home the par attempt to hold onto his share of the lead and his spot in the final twosome with Rose. Justin Rose's third strike is better landing on the green.
They'll make W.W.A.D bracelets if Spieth can pull off this Masters victory on Sunday, the first one since the great Palmer's death.
Rose played in the final group when Jordan Spieth won in 2015 with a record-tying score, finishing at 14-under 274 that year, which tied for lowest non-winning score and has been bettered only six times in tournament history.
"I'm certainly not getting ahead of myself". I have an opportunity.
He believes it will be a thinking-man's game Sunday, particularly on the back nine.
SHOT OF THE DAY: Spieth hit a 5-iron off the pine straw and over the tributary of Rae's Creek on the par-5 13th to 30 feet. "You have to go out and play a good round of golf".
"If I just finished the way he did, it's a little different story putting up a decent round today", said Fowler. Sunday would have been the 60th birthday of Seve Ballesteros, Garcia's mentor and countryman, who passed away at the age of 54. "So it means a lot".
He said as much after Saturday's third round and re-iterated the point again following Sunday's final round.
Jordan Spieth (-4) - +315 - How are you going to argue with this number for the King of Augusta National. "It would be nice to have a chance and hopefully do it".
"You can't just start to gung-ho it around here and go for shots that aren't on".
Spieth was joined at four-under 212 by fellow-Americans Ryan Moore and Charley Hoffman, the journeyman who led the tournament after a sparkling first-round 65 but dropped three shots over Saturday's closing holes to slip down the leaderboard.
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Fowler, who shot 71 Saturday, trails leaders Justin Rose and Sergio Garcia, who are both 6-under. "Guys can either melt down or guys can come from behind and win big".
And most menacing, two shots back is Jordan Spieth, the 2015 victor who has never finished lower than second in three previous appearances at Augusta National.
"It was the most free that I've ever felt at Augusta National", he said.
Next is Spieth, who opened with 75.
The last person to win a major championship after trailing by at least 10 shots after the first round was Harry Vardon.
Jordan Spieth, the 2015 Masters champion whose back-nine Sunday meltdown a year ago cost him a repeat crown, fired a 68 to share fourth on 212 with fellow Americans Ryan Moore and Charley Hoffman, a co-leader until finding the water at the par-3 16th and making double bogey.
"You've got some studs up there", said Spieth, looking at the leaderboard. Spieth made a quadruple bogey in the opening round.
His Masters finishes are tied for second, first and tied for second. "I know that; if I am able to jump out into the lead, I know that you have to keep the gas pedal down and pretend you're not".
"I think that the key to the strong finish was the patience that I showed on the front nine", he said.
"Anything can happen. So it's really going to be an exciting day tomorrow".