James Conner Greene (born April 4, 1995) is an American professional baseball pitcher who is a free agent.

He has previously played in Major League Baseball (MLB) for the Baltimore Orioles and Los Angeles Dodgers.

[4] He was assigned to the Rookie-level Gulf Coast League Blue Jays for the 2013 season and pitched to a 1–1 record, 5.28 ERA, and 20 strikeouts in 302⁄3 innings.

[2] Greene began the 2015 season with the Single-A Lansing Lugnuts, where he posted a 7–3 win–loss record, 3.88 ERA, and 65 strikeouts in 671⁄3 innings, before being promoted to the High-A Dunedin Blue Jays.

[6] He was then promoted to the Double-A New Hampshire Fisher Cats, and took the win in his debut on August 13, pitching six shutout innings against the Akron RubberDucks.

[2] After the 2016 season, the Blue Jays assigned Greene to the Mesa Solar Sox of the Arizona Fall League.

[14] On January 19, 2018, the Blue Jays traded Greene along with Dominic Leone to the St. Louis Cardinals in exchange for Randal Grichuk.

[15] He began the 2018 season with the Double-A Springfield Cardinals and was promoted to the Triple-A Memphis Redbirds in June.

On March 14, 2022, Greene re-signed with the Orioles organization on a minor league contract that included an invitation to Spring Training.

[32] Conner Greene's journey led him to sign with the Diablos Rojos del México of the Mexican League on July 2, 2022.

Conner Greene will likely start the upcoming season playing for the Sugar Land Space Cowboys at the Triple-A level.

He is friends with actor Charlie Sheen, and made several minor appearances on the television series Anger Management.