Justin Charles Garza (born March 20, 1994) is an American professional baseball pitcher in the San Francisco Giants organization.

He was named a high school All-American as a senior by Baseball America after posting a 12–1 record on the mound with a 0.72 earned run average (ERA) and 101 strikeouts over 88 innings pitched.

Garza's junior season was cut short after he suffered a partially torn UCL that required Tommy John surgery.

After signing with the team, Garza spent rest of the 2015 and much of the 2016 rehabbing from his surgery before being assigned to the Arizona League Indians towards the end of the season.

In 2018, Garza split the season between the Low-A Mahoning Valley Scrappers and the High-A Lynchburg Hillcats of the Carolina League, accumulating a 5–6 record and 3.36 ERA in 18 games between the two teams.

[8] Garza made his major league debut on June 27, and pitched 2+2⁄3 innings of one-run relief with three strikeouts against the Minnesota Twins in an 8–2 loss.

[23] In 39 appearances for the Single–A San Jose Giants and Triple–A Sacramento River Cats, he compiled a 5–2 record and 3.60 ERA with 63 strikeouts and 4 saves across 55 innings pitched.