From Ridgefield, Washington, he is from a family of throwers, with his grandfather, John Gambill, a volunteer coach for his local high school team. He attended Ridgefield High School (Washington). Knight set a national high school record in the hammer throw in 2020 and was named Washington State Athlete of the Year for boys track and field in three consecutive years.
He was fouled out at the NCAA West Outdoor regionals in 2025 and so did not qualify for the 2025 NCAA Outdoor Championships. However, he did go on to throw a personal best 78.15 metres at the Portland Track Festival in June 2025.
He placed second with a new personal best of 78.76 metres at the 2025 USA Track and Field Championships. In September 2025, he competed in the hammer throw at the 2025 World Championships in Tokyo, Japan, qualifying for the final and placing tenth overall.
On 28 March 2026, he placed second behind Rudy Winkler in the hammer throw at the USATF Winter Long Throws National Championship in Arizona with a personal best throw of 79.33 metres. In July, Knight placed fifth in the hammer throw at the 2026 Prefontaine Classic. On 23 July 2026, competing in the hammer throw at the 2026 USA Outdoor Track and Field Championships in New York, he finished third overall.
References
↑"Trey Knight". World Athletics. Retrieved 31 July 2025.