Walters grew up in Palm Bay, Florida and attended Bayside High School.

[5] Walters was selected in the 18th round of the 2022 Major League Baseball draft by the Baltimore Orioles, but opted to return to Miami for his redshirt junior season.

[6] He was named a consensus first-team All-American in 2023 after finishing the season with a 4-0, 12 saves, and 1.21 ERA with 72 strikeouts in 44+2⁄3 innings pitched over 28 appearances.

[7] Walters was selected by the Cleveland Guardians in the second round, with the 62nd overall pick in the 2023 Major League Baseball draft.

In 50 appearances split between Akron and the Triple–A Columbus Clippers, Walters compiled a 4–0 record and 2.32 ERA with 79 strikeouts and 8 saves over 50+1⁄3 innings pitched.