Eckroat finished in solo fifth place at the 2021 Big 12 Championships and finished in solo seventh place at the 2021 NCAA Division I Central Regional. He also finished T17 at the 2021 NCAA Division I Championships. 

He finished runner-up at the 2019 Oklahoma State Amateur and won the 2019 Cabo Collegiate, one of the top collegiate tournaments of the spring schedule. He also made the match play portion of the 2019 U.S. Amateur, falling to Julien Sale in the round of 64 in 19 holes. Eckroat also finished T8 at the 2019 NCAA Division I Championships and in solo second place at the 2018 Pacific Coast Amateur. 

As a junior golfer, Eckroat won the prestigious Junior Invitational at Sage Valley and was the medalist at the 2017 U.S. Junior Amateur. He lost in the quarterfinals to future teammate Matthew Wolff. 

Eckroat finished runner-up at the 2023 AT&T Byron Nelson, one shot behind Jason Day, and in the final round of the 2023 U.S. Open, he tied the 9-hole record of 29. He finished T10.

Amateur Victories
2015 Scott Robertson Memorial, Oklahoma Junior Boys
2016 Junior Invitational at Sage Valley
2018 Wyoming Desert Intercollegiate
2019 Cabo Collegiate

International Competition
2019 Palmer Cup
2021 Walker Cup