Phil Mickelson entered the PGA Championship at odds anywhere between 200-1 and 300-1 at most sports books.

“He got out as far as 400-1 after bogeying the first hole in Round 1,” said Pat Eichner, of PointsBet.

It was hard to imagine on Thursday afternoon after Lefty started off with a 5 on the par-4 that he would come back and become the oldest player ever to win a major.

The 50-year-old Mickelson turns 51 on June 16.

“We always write some tickets on him just because everyone loves Phil,” said Tom Gable, sportsbook director at the Borgata. “But Phil winning [was] a very good result for us.”

DraftKings might not agree. They had to pay out $300,000 to an unidentified New Jersey bettor who put $1,000 on Mickelson at 300-1.

Mickelson himself claimed $2.16 million for the second PGA Championship of his storied career.

1. Phil Mickelson
t2. Louis Oosthuizen
t2. Brooks Koepka
t4. Shane Lowry
t4. Padraig Harrington
t4. Harry Higgs
t4. Paul Casey

Any liability for Mickelson’s win was paid with other losers, such as the $10,000 wager on Justin Thomas to win place at BetMGM. Thomas missed the cut.

Keegan Bradley (t-17th), Jordan Spieth (t-30th), and Viktor Hovland (t-30th) also were among the popular players bet on prior to the tournament.

PointsBet paid out $37,500 to a New Jersey bettor who got down on Lefty when he was at 250-1. They also booked a $5,000 live bet when he was a little over 3-1.

Eichner said Mickelson was still a healthy longshot at 100-1 after shooting a 70 on Thursday, He was 12-1 after Friday’s second round.

“Even coming into today, up two strokes, Phil was not the favorite to win the tournament,” Eichner said. “Brooks [Koepka] was at +150 [3-2 odds] and Phil was at +300 [3-1 odds]. “Bettors were not confident in Phil to win either -- the live liability/bets on Brooks came often this weekend.”

Koepka shot a 2-over 74 and finished tied for second, two shots back of Mickelson.