[1] He attended Roberto Clemente Community Academy and began playing baseball in his freshman year.

[2][6] In 2018, Marciano played for the Augusta GreenJackets, and was named to the South Atlantic League All-Star Game.

[7] He struggled with the San Jose Giants in 2019, allowing 40 hits in 41+2⁄3 innings pitched, and retired from baseball in July.

Marciano chose to return to baseball in 2020, but the minor league season was canceled due to the COVID-19 pandemic.

[9] In 2023, he made 31 appearances for the River Cats, but struggled to a 4–5 record and 6.75 ERA with 51 strikeouts and 3 saves in 42+2⁄3 innings pitched.

[10] On January 10, 2024, Marciano signed with the Diablos Rojos del México of the Mexican League.