Trevor Michael Kelley (born October 20, 1992) is an American professional baseball pitcher who is a free agent.

He has previously played in Major League Baseball (MLB) for the Boston Red Sox, Philadelphia Phillies, Milwaukee Brewers and Tampa Bay Rays.

[1] He attended the University of North Carolina and played college baseball for the Tar Heels in addition to pursuing a degree in exercise and sport science.

[5] Kelley opened the 2019 season back with Pawtucket,[2] where through the end of June he had a 5–2 record in 28 games (all in relief) with a 0.96 ERA and 34 strikeouts in 37+2⁄3 innings.

[13] Overall with the 2019 Red Sox, Kelley appeared in 10 games, compiling an 0–3 record with an 8.64 ERA and six strikeouts in 8+1⁄3 innings.

[18] Kelley spent the 2021 season with the Triple-A Gwinnett Stripers, making 37 appearances with a 1.52 ERA and 46 strikeouts.

On November 18, 2021, Kelley signed a minor league deal with the Milwaukee Brewers, with an invite to spring training.

On the year, Kelley made a career-high 18 appearances, logging a 6.08 ERA, striking out 23 in 23.2 innings of work, and collecting his first career win.

[21] On January 18, 2023, Kelley signed a minor league contract with the Tampa Bay Rays organization.