James Douglas Kaprielian (/kəˈprɪl.i.ən/; born March 2, 1994) is an American professional baseball pitcher who is a free agent.

[12][13] He began the season with the Tampa Yankees,[14] but only played in three games due to an injured flexor tendon in his right elbow.

[17] On April 18, 2017, he underwent Tommy John surgery to repair a torn ulnar collateral ligament, ending his season.

[18] On July 31, 2017, the Yankees traded Kaprielian to the Oakland Athletics, along with fellow prospects Jorge Mateo and Dustin Fowler, in exchange for Sonny Gray.

He accumulated a 4.46 ERA in 36+1⁄3 innings with a 43:8 K-to-BB ratio before the Athletics promoted him to the Double-A Midland RockHounds on July 23.

On May 12, 2021, injuries in the rotation led to Kaprielian receiving a call-up to make his first MLB start at Fenway Park against the Boston Red Sox.

[24] With his father and uncle in attendance, Kaprielian was rewarded with the win, allowing one run in five innings with six strikeouts in a 4–1 victory for the Athletics.

[25] On July 27, Kaprielian collected his first career base hit, notching a single against San Diego Padres pitcher Chris Paddack.

[32] On August 2, 2023, it was announced that Kaprielian would miss the remainder of the season after undergoing right shoulder arthroscopic surgery to repair a labrum tear.