Bruce Kastulo Chen (born June 19, 1977) is a Panamanian former professional baseball pitcher who played in Major League Baseball (MLB) for the Atlanta Braves, Philadelphia Phillies, New York Mets, Montreal Expos, Cincinnati Reds, Houston Astros, Boston Red Sox, Baltimore Orioles, Texas Rangers, Kansas City Royals, and Cleveland Indians, from 1998 to 2015.

His paternal grandfather, Kuen Chin Chan Lee, joined his brothers and other relatives in Panama at age nine during the Chinese Civil War.

Chen's maternal grandmother, Kuen Yin Liu de Laffo, was born in Panama, but her family had to return to China after fire destroyed their home.

He made the South Atlantic League All-Star team in 1997 when he went 12–7 with a 3.51 ERA in 28 starts for the Macon Braves.

[6] Chen was traded again on April 5, 2002, to the Montreal Expos (with Luis Figueroa, Saul Rivera and Dicky Gonzalez) for Phil Seibel, Scott Strickland and Matt Watson.

[1] He threw five innings, giving up four hits, two runs (both earned), and a walk, with three strikeouts, against a powerful Cuba team in the opening round of the tournament at San Juan, Puerto Rico.

During the 2006 regular season, he went 0–7 with a 6.93 earned run average (ERA), starting 12 games, but appearing in 28 others coming out of the bullpen.

Chen signed a minor league contract with the Texas Rangers on February 6, 2007, with an invitation to spring training.

Chen made the Rangers' opening day roster, taking a spot in the bullpen.

He was reported to have reworked his contract to accept an outright assignment to Triple-A Oklahoma if room was needed on the roster.

On March 1, 2009, Chen signed a minor league contract with the Kansas City Royals.

[9] On October 1, 2010, in his last start of the season, Chen threw a two-hit shutout against the Tampa Bay Rays, striking out seven and only walking two.

[21] Following his retirement, Chen worked as a Cultural Development Adviser for the Cleveland Indians organization.

As of November 25, 2017, he was no longer with the Indians, and had moved to the Los Angeles Dodgers organization to serve as their Latin America Field Coordinator.