High school and college
Maton was drafted by the San Diego Padres in the 20th round of the 2015 Major League Baseball draft.  He made his professional debut that year with the Short Season-A Tri-City Dust Devils.  In 23 relief appearances, Maton pitched to a 4–2 win–loss record, 1.38 earned run average (ERA), and 58 strikeouts in 32 2⁄ 3 innings pitched.  In 2016, Maton pitched for the Class-A Fort Wayne TinCaps, Advanced-A Lake Elsinore Storm, and Triple-A El Paso Chihuahuas.  He made a total of 38 appearances for the three teams, and posted a 5–3 record, 1.74 ERA, and 78 strikeouts in 51 2⁄ 3 innings.  After the season, he played in the Arizona Fall League for the Peoria Javelinas.  Maton began the 2017 season with Triple-A El Paso.