Christopher James Mazza (born October 17, 1989) is an American professional baseball pitcher who is a free agent.

He has previously played in Major League Baseball (MLB) for the New York Mets, Boston Red Sox, and Tampa Bay Rays.

[8] He made his major league debut on June 29 against the Atlanta Braves, pitching four innings in relief in which he gave up one earned run while striking out two.

[9] Overall with the 2019 Mets, Mazza appeared in nine games, all in relief, compiling a 1–1 record with 5.51 ERA in 16+1⁄3 innings pitched while striking out 11 batters.

[13] He was added to Boston's active roster on July 29,[14] and made his first appearance with the team on August 1 against the New York Yankees.

[15] He was optioned to the Red Sox' alternate training site after the game of August 5, as clubs reduced their 2020 active rosters to 28 players.

[17] Overall with the 2020 Red Sox, Mazza appeared in nine games (six starts), compiling a 1–2 record with 4.80 ERA and 29 strikeouts in 30 innings pitched.

[19] He gave up the longest MLB home run of the season, a 495-foot (151 m) shot to Ronald Acuña Jr. of the Atlanta Braves.

[21] On February 17, 2021, the Red Sox traded Mazza and Jeffrey Springs to the Tampa Bay Rays in exchange for Ronaldo Hernández and Nick Sogard.

[22] On August 27, Mazza pitched the final 3 innings of a 6–3 victory over the Baltimore Orioles to earn his first career save.