Eli Marrero

Marrero was selected in the third round of the June 1993 MLB draft by the St. Louis Cardinals. He missed much of the 2000 season due to thyroid cancer. During that time, he lost his job as the starting catcher for the Cardinals, so when he returned he started logging time in the outfield and at first, in addition to occasional duty behind the plate. While with the Cardinals, Marrero caught Bud Smith's no-hitter on September 3, 2001.

The Cardinals traded Marrero to the Atlanta Braves in December 2003 as part of a package for pitchers Jason Marquis and rookie prospect Adam Wainwright, where he hit .415 against left-handed pitchers as a platoon outfielder. Following the 2004 season, the Braves dealt him to the Kansas City Royals, who were in need of a power-hitting corner outfielder, in exchange for minor-league pitcher Jorge Vasquez. He saw action at all three outfield positions and first base, but hit only .159 in 32 games. The Royals designated him for assignment on May 31, 2005, giving them 10 days to trade or release him. On June 8, the Royals traded him to the Baltimore Orioles for minor-league infielder Peter Maestrales.

On June 9, 2006, while playing for the AAA affiliate of the Colorado Rockies, Marrero was traded to the New York Mets for infielder Kaz Matsui. On July 2, 2006, Marrero saw his first Major League action at third base, playing two innings there for the Mets. On August 8, 2006, he was designated for assignment. On November 28, 2006, Marrero was signed to a minor league deal by the St. Louis Cardinals. On May 21, 2007, Marrero was released by the Memphis Redbirds, the Cardinals' Triple-A affiliate, after just one game.

In July 2011, Marrero was named the batting coach of the Billings Mustangs. Marrero was the manager of the Arizona League Reds for the 2013 season. On December 1, 2014, Marrero was named manager of the Reds Class A-Advanced affiliate, the Daytona Tortugas. Marrero was with the Tortugas until late in the 2017 season.

Marrero's son Elih was a 29th round pick by the Cincinnati Reds in the 2015 MLB draft, but he elected to play college baseball at Mississippi State. Elih later transferred to St. Thomas University in Florida, and was selected by the Boston Red Sox in the eighth round of the 2018 MLB draft.