Robert Anthony Stock (born November 21, 1989) is an American professional baseball pitcher in the Boston Red Sox organization.

Listed at 6 feet 1 inch (1.85 m) and 260 pounds (120 kg), he throws right-handed and bats left-handed.

Stock was born in Bellevue, Washington[1] and grew up in Agoura Hills and Westlake Village, California.

[8] In 2002, he threw a no-hitter to lead Agoura to an 11–1 victory over Taiwan in the Pony Baseball's Bronco League World Series (ages 11–12) championship game.

[2] He also had a 5–3 win–loss record and a 2.69 earned run average (ERA) as a pitcher, as his fastball reached 95 miles per hour (153 km/h) and batters hit .218 against him.

[15][2][12][16][11] He graduated from Agoura a year early, an honor student with a 3.8 GPA and a 1410 SAT score.

[2][17][18] Stock passed up what some felt was a certain first-round selection in the 2007 MLB draft, to instead enroll a year early at the age of 16, at the University of Southern California (USC) in its Resident Honors Program, which allows 30 high school students to enroll a year early.

"[27] He recalled that "One offseason, I was living in my parents' basement and I was playing video games and my mother said, 'Go out and do something," and I said, 'Mom, relax.

[31] Between the High-A Daytona Tortugas and the Double-A Pensacola Blue Wahoos, Stock was 9–5 with a 2.82 ERA in 70 innings in 41 games.

[33] The San Diego Padres signed Stock to a minor league contract on November 27, 2017, with a non-roster invitation to spring training included.

[12] He had the second-lowest swing rate for sliders he threw in the strike zone of any MLB pitcher (43.1%), behind only Aroldis Chapman (42.5%).

[47] He made his first appearance for the Red Sox on August 11, pitching a scoreless 1+1⁄3 innings against the Tampa Bay Rays.

[49][50] On September 1, 2020, after a fan posted on Twitter "I implore you all to put on the Red Sox game, they have this dude Robert Stock pitching, and he looks like he's twice-divorced and completely given up on life.

It's transfixing," his wife responded on Twitter: "0 times divorced, but if he keeps walking the lead-off batter, I’ll consider filing.

"[51][52] Overall with the 2020 Red Sox, Stock appeared in 10 games, all in relief, compiling an 0–1 record with 4.73 ERA and 14 strikeouts in 13+1⁄3 innings pitched.

[55] On March 3, Stock cleared waivers and was outrighted to the Triple-A Iowa Cubs; he was also invited to Spring Training as a non-roster invitee.

[57] Stock was optioned to Iowa on June 17 after allowing 5 runs in 4 innings against the New York Mets, struggling with command and walking 6 batters.

[62] Stock started 29 games for Doosan, logging a 9–10 record and 3.60 ERA with 138 strikeouts in 165 innings pitched.

[45] On June 16, 2023, Stock signed with the Long Island Ducks of the Atlantic League of Professional Baseball.

[67] In 16 starts for Long Island, Stock registered a 9–4 record and 4.40 ERA with 92 strikeouts across 102+1⁄3 innings pitched.

[68] On February 13, 2024, Stock signed with the Tecolotes de los Dos Laredos of the Mexican League.

[73] On January 14, 2025, Stock signed a minor league contract with the Boston Red Sox, with an invitation to spring training.