Calvin Maduro

Calvin Gregory Maduro (born September 5, 1974) is an Aruban former professional baseball pitcher who currently serves as the bench coach for the Leones de Yucatán of the Mexican League. He played five years in Major League Baseball between and for the Philadelphia Phillies and Baltimore Orioles. After his playing career, he became a minor league pitching coach and scout for the Orioles and Minnesota Twins.

He pitched for the Netherlands in the 2004 Summer Olympics.

Playing career Maduro signed with the Orioles, one of several Aruban players who would play for the Orioles signed by scout Jesus "Chu" Halabi, as an international free agent on September 9, 1991. As a prospect, Maduro had one of the best changeups in the Orioles farm system.

Maduro was sent from the Orioles to the Phillies on September 3, 1996, completing a trade that began when Todd Zeile and Pete Incaviglia were acquired by Baltimore on August 29 and ended when Garrett Stephenson also went to Philadelphia on September 4. Maduro was a September call-up for the Phillies, making his MLB debut on September 8, five days after Gene Kingsale of the Orioles became the first Aruban to play in MLB. He pitched in Triple-A in 1998, with the Phillies releasing him after the season. He re-signed with the Orioles as a minor league free agent in 1999, spending another season in Triple-A. He re-signed in 2000 and made the Orioles Opening Day starting rotation. He start on April 7 was his first MLB start since July 1997. He signed with the New York Yankees in May 2005, becoming a free agent after the season.

International career Maduro made his debut with the Netherlands national team at the 2003 Baseball World Cup. He was named the best pitcher of the 2004 Haarlem Baseball Week tournament, which the Dutch won. At the 2004 Summer Olympics in Athens, he and his team finished sixth. He went 1–1 in two starts with a 2.35 ERA in innings. He pitched for the Netherlands in the 2006 World Baseball Classic, allowing 6 runs in three innings.

Post-playing career In , Maduro was named the pitching coach for the Aberdeen IronBirds of the New York–Penn League, an Orioles farm team. He spent three seasons there, then two more seasons with the Gulf Coast Orioles before becoming a scout in . He was fired in 2019 by new general manager Mike Elias.

The Minnesota Twins hired Maduro as the pitching coach of the Single-A Cedar Rapids Kernels in 2020, but the minor league season was canceled due to the COVID-19 pandemic. He became the pitching coach for the Gulf Coast Twins in 2021, holding that job through 2023.

On May 20, 2026, Maduro was hired to serve as the bench coach for the Leones de Yucatán of the Mexican League.

Honors After the 2003 season, Maduro was decorated as a Knight in the Order of Orange-Nassau, along with fellow Aruban baseball players Gene Kingsale and Sidney Ponson.

Personal life Maduro graduated from the Tourist Economy School in Aruba in 1991, where he played baseball, soccer, and volleyball. He attended St. Antonius College.

Following his playing career, Maduro resided in Millersville, Maryland.