Samuel Joseph Gaviglio (born May 22, 1990) is an American professional baseball pitcher who is a free agent.

He starred for his school's baseball team in his senior year; Gaviglio pitched to a 13–0 win–loss record with an earned run average (ERA) of approximately 0.50.

[1][2][3] The Tampa Bay Rays selected Gaviglio in the 40th round of the 2008 MLB draft, but he did not sign.

[2] Gaviglio enrolled at Oregon State University to play college baseball for the Beavers.

[6] On November 20, 2014, the Cardinals traded Gaviglio to the Seattle Mariners for infielder Ty Kelly.

[8] On May 11, 2017, he made his major league debut for the Mariners against the Toronto Blue Jays at Rogers Centre, allowing one run in two innings in relief.

Gaviglio spent most of the season in the Blue Jays rotation, finishing with a 3–10 record over 24 starts and 2 relief appearances.

[17][18] On January 30, 2021, Gaviglio signed a minor league contract with the Texas Rangers and was invited to spring training.

[20][21] He made his KBO debut on July 2 against the Lotte Giants, pitching 5+2⁄3 innings of 4-run ball with 2 strikeouts.

[8] On January 28, 2022, Gaviglio signed a minor league contract with the Los Angeles Dodgers.

[24] On June 20, 2023, Gaviglio signed with the Gastonia Honey Hunters of the Atlantic League of Professional Baseball.

[10] In high school, Gaviglio was a safety on the football team, earning all-conference honors his senior season.