Fernando Gabriel Tatís Medina Sr. (born January 1, 1975) is a Dominican former professional baseball third baseman and Minor League Baseball (MiLB) manager. Over his 11-year Major League Baseball (MLB) career, Tatís played for the Texas Rangers, St. Louis Cardinals, Montreal Expos, Baltimore Orioles, and New York Mets. He holds the major league record for runs batted in (RBI) in an inning, a feat that he achieved by hitting two grand slams in one inning during a game on April 23, 1999, becoming the only player in MLB history to do so. His son, Fernando Jr., plays for the San Diego Padres. Playing career At the age of 17, Tatís was signed as an amateur free agent by Omar Minaya and the Texas Rangers on August 25, 1992. Tatís played his first game in Major League Baseball with the Rangers, at third base, almost five years later on July 26, 1997, and went on to play 60 games with the Rangers in his rookie season. At the trade deadline on July 31, 1998, the Rangers traded Tatís along with Darren Oliver and Mark Little to the St. Louis Cardinals for Royce Clayton and Todd Stottlemyre. Tatís had the best season of his career in 1999 with the St. Louis Cardinals. He hit 34 home runs with 107 RBI and 21 stolen bases, with a .298 batting average. On April 23, 1999, Tatís made baseball history when he hit two grand slams in one inning. He is the only batter in MLB history to accomplish this feat. Tatís hit both of his grand slams against starting pitcher Chan Ho Park of the Los Angeles Dodgers. With these two grand slams, Tatís also set a Major League record with eight runs batted in during a single inning. After playing only 96 games for the Cardinals in 2000 because of an injury, Tatís was traded to the Montreal Expos along with Britt Reames for Dustin Hermanson and Steve Kline. Tatís played just 208 games over three seasons with the Expos because of injuries. The Tampa Bay Devil Rays invited Tatís to spring training in 2004, but he did not make the team and was released. Tatís next did not play professional baseball for two seasons and resided in the Dominican Republic. The Baltimore Orioles signed Tatís to a minor-league contract on November 25, 2005. He returned to baseball to raise money to build