On the senior level circuit, Marsteller represented the United States at the 2023 World Championships in men's freestyle wrestling at 79 kg.

[6] He made his Oklahoma State debut on November 14, 2015, before 42,287 fans at Iowa's Kinnick Stadium, winning his dual meet match with a 14–11 score.

However, Marsteller had been in a steady decline with alcohol and drug addiction, which started to intensify during his college years.

[10] While turning things around and finding success on and off the mat, Marsteller later came out with how he had relapsed and continued to struggle with drug addiction throughout college.

Around the start of 2022, Marsteller began visiting the New York City Regional Training Center in Hoboken, New Jersey, and ultimately moving there for more individual coaching and a strong group of wrestling partners.

The following year, he bested Jordan Burroughs at the 2023 Final X, making his first senior level United States World Team.

On November 15, 2024, a documentary was released on Marsteller's comeback story of going from a high school phenom, to falling into drug addiction, to finding redemption and redefining his legacy.