It took an all-time record to do it, but oddsmakers won't be caught off-guard if Phil Mickelson wins another major championship this season.
The soon-to-be 51-year old outlasted two-time PGA Championship winner Brooks Koepka and Louis Oosthuizen on Sunday at the PGA Championship at Kiawah Island's Ocean Course. Mickelson finished with a two-stroke lead at 6-under par. At age 50, he became the oldest major championship winner, passing Julius Boros back in 1968 when he won the PGA Championship at age 48.
Multiple sportsbooks held substantial liability on Mickelson as he contended throughout the tournament, and after taking a sizable hit, many have already adjusted their futures odds for the next major on the PGA calendar.