College career Sam Mattis competed for the
University of Pennsylvania Quakers, where he was a member of the track and field program for four years. He won the discus throw at the 2015
NCAA National Championships. He also won the 2016 Philadelphia College Classic with a throw of 67.45 m (221 ft 3 in), a mark reported as one of the top collegiate performances in the event. Mattis also earned three
NCAA All-American honors, and was named the USATFCCA/NCAA National Scholar of the year. The
U.S. Track & Field and Cross Country Coaches Association selected him as the 2015 Male Scholar Athlete of the Year for Division I. He is a four-time Heps Outdoor Champion in the discus throw, and received First-Team All-Ivy honors for each of his four outdoor seasons.
Professional Career 2019 Mattis won the gold medal at the
2019 Outdoor USA Track and Field Championships, with a throw of 218-9. At the
2022 World Athletics Championships in Eugene, Oregon, Mattis qualified for the final in the men’s discus throw with a mark of 65.59 m in the qualifying round. In the final, he placed 11th with a best throw of 63.19 m.
2023 Mattis won the gold medal in the discus throw with a throw of 65.93 m (216 ft 3 in) at the 2023
USA Outdoor Track and Field Championships at
Hayward Field in
Eugene, Oregon in July 2023. He won the silver medal with a throw of 64.69m at the 2023 Doha Diamond League in Doha, Qatar.
2024 Mattis won the silver medal in the discus throw with a throw of 66.07 m (216 ft 9 in) at the
2024 United States Olympic trials. Mattis represented the
United States at the 2024 Summer Olympics in
Men's discus throw at
Stade de France in Paris.
2025 At the 2025 Oklahoma Throws Series World Invitational in
Ramona, Oklahoma, Sam Mattis competed in the men’s discus throw. He placed third in the event with a mark of 71.27 m (233 ft 10 in), achieved in the final round of competition. The meet featured multiple throws over 70 m among the top competitors. Mattis’ 71.27 m throw was his then personal-best performance and ranked among the top American performances of the 2025 season. Mattis completed at the 2025 World Athletics Championship but did not make the final.
2026 On April 9th, 2026, Mattis competed at the Oklahoma Throws Series World Invitational in Ramona, Oklahoma, in the men’s discus throw. He placed fourth in a highly competitive field with a mark of 72.45 m (237 ft 8 in), setting a new personal best and beating the previous
American record held by
Ben Plucknett from 1981. ==Honors==