Doyle was born in
Boston but grew up in
New Hampshire. He attended
Pinkerton Academy in
Derry, New Hampshire. Over his junior and senior seasons in high school he combined to go 15–2 with a 0.68
earned run average (ERA) with 226
strikeouts in 113 innings. Doyle started his college baseball career with
Coastal Carolina University in 2023. He appeared in 23 games with seven starts and went 3–1 with a 4.15 ERA and 69 strikeouts in innings. After the season, Doyle played
collegiate summer baseball with the
Bourne Braves of the
Cape Cod Baseball League, and entered the
transfer portal and transferred to the
University of Mississippi. In his lone season at Ole Miss in 2024, he started 11 of 16 games, going 3–4 with 5.73 ERA and 84 strikeouts in 55 innings. Doyle entered the transfer portal after the season and transferred to the
University of Tennessee. Doyle entered the 2025 season as Tennessee's number one starter. In March 2025, Doyle was ranked by
Keith Law of
The Athletic as the top prospect in the
2025 Major League Baseball draft. Against the
St. Bonaventure Bonnies, he combined with four other pitchers to throw the first
no-hitter for Tennessee since 2002. Doyle appeared in 19 games (with 17 starts) for Tennessee, going 10-4 with a 3.20 ERA and 164 strikeouts and was named the
Southeastern Conference Baseball Pitcher of the Year. ==Professional career==