The two edged the teams of Carlton Forrester / Matt Kuchar and Robert Long III / Richy Werenski who had rounds of 65.
McCoy and Wagner also won the Net competition with a 61 but as they could only win one prize, the Net award went to Christie Flanagan and Carlos Ortiz, who had a net 62.
Related: 2019: McCoy, Tringale take top honors at Seminole Pro-Member
Former Walker Cupper Rickie Fowler teamed up with former Walker Cup player and captain Buddy Marucci to shoot 69 (T15), while Rory McIlroy teamed up with his father Gerry to shoot 70 (T26).
Nick Price was the low senior, teaming with Kelly Miller for a 69 (T15), tied with among others, the low woman professional Jaye Marie Green who paired with Rich Druckner.
The field at Seminole might have been more interesting than the field for the Honda Classic, which ended the day before the event. It included Hall of Famers including Jack Nicklaus (who just turned 80), Nick Faldo, Ernie Els and Beth Daniel; top pros like Rory McIlroy, Rickie Fowler, Phil Mickelson and Jessica Korda; and Walker Cup captains Buddy Marucci, Spider Miller, Nathaniel Crosby, Vinny Giles and Danny Yates.