JP Flavin
John "J.P." Flavin is an American long-distance runner. Flavin is ranked 23rd in the United States men's marathon in 2025. He won the December 2025 The Marathon Project in Chandler, Arizona in a personal best time of 2:09:18.
Raised in Toms River, New Jersey, Flavin competed in cross country at Toms River High School North and was named to the all-state second team in 2015.
Professional
Flavin qualified for the 2024 United States Olympic trials in Orlando, Florida during his debut at the 2022 Chicago Marathon where he placed 26th with a finishing time of 2:14:55.He placed 17th in 2:13:27 at the 2023 Boston Marathon.
He placed 21st in 2:12:34 at the 2024 Chicago Marathon.
He placed 16th in 2:10:50 at the 2025 Boston Marathon. He won the 49th annual 10K Bellin Run on June 14, 2025, in Green Bay, Wis. He placed 13th in 59:28 at the U.S. 20 km Championships in New Haven, Connecticut Monday morning on September 1, 2025. He won the December 2025 The Marathon Project in Chandler, Arizona in a personal best time of 2:09:18.