Robert Harris Kaminsky (born September 2, 1994) is an American professional baseball pitcher in the St. Louis Cardinals organization.

[8] Kaminsky attended Saint Joseph Regional High School in Montvale, New Jersey, graduating in 2013.

[2][12] In his junior year in 2012 he was 8-2 with a 0.20 earned run average (ERA), struck out 103 batters and walked 20 in 53 innings, and pitched three no-hitters and three one-hitters.

[1][31][32] On July 30, 2015, the Cardinals traded Kaminsky to the Cleveland Indians in exchange for outfielder/first baseman Brandon Moss.

3 prospect in the St. Louis organization, and 88th overall, and Scout ranked him the best pitcher in the Cardinals' minor league system.

[36][37] Kaminsky spent the 2016 season with the Akron RubberDucks of the Double-A Eastern League, where he posted an 11-7 record and a 3.28 ERA.

[1][21][38] He was placed on the disabled list with left forearm soreness after one start for Akron in 2017, and did not pitch during the remainder of the season.

[49][50][51] On April 18, 2021, Kaminsky signed a minor league contract with the Philadelphia Phillies organization.

[52] In his lone appearance for the Triple-A Lehigh Valley IronPigs, Kaminsky struck out 2 over one scoreless inning.

[53] On April 6, 2022, Kaminsky signed a minor league contract with the Seattle Mariners organization.

[54] Pitching for the Double-A Arkansas Travelers in 2022, he was 3-1 with one save, a 4.91 ERA, and 39 strikeouts across 39 relief appearances covering 36+2⁄3 innings.

[57] He split the year between the Triple-A Tacoma Rainiers, Arkansas, and rookie–level Arizona Complex League Mariners, for whom he was a combined 6-1 with a 5.13 ERA in 32 games (2 starts) in which he pitched 40+1⁄3 innings.

[59] On June 2, 2024, Kaminsky signed with the Staten Island FerryHawks of the Atlantic League of Professional Baseball.