Fernando Tatís, a Dominican-born athlete, embarked on his Major League Baseball (MLB) journey with a debut for the Texas Rangers in 1997. Known for his powerful hitting and versatility on the field, Tatís quickly became a player to watch. His early years with the Rangers showcased his potential, but it was his subsequent move to the St. Louis Cardinals that truly highlighted his abilities.

In 1999, while playing for the Cardinals, Tatís etched his name into the annals of baseball history. On April 23, during a game against the Los Angeles Dodgers, he achieved the unprecedented feat of hitting two grand slams in a single inning. This remarkable accomplishment remains unmatched in MLB history, underscoring Tatís's capability to deliver extraordinary performances.

Tatís's tenure with the Cardinals was marked by solid offensive statistics and reliable infield defense. His ability to play multiple positions, primarily third base, added depth to the team's roster. However, injuries began to affect his career, leading to fluctuations in his performance and playing time.

In 2001, Tatís was traded to the Montreal Expos, where he continued to demonstrate his batting prowess when healthy. Despite battling injuries, he managed to contribute to the team's efforts with his experience and skill. His time with the Expos was followed by a stint with the Baltimore Orioles, although his appearances were limited due to ongoing health issues.

After a brief hiatus from MLB, Tatís made a comeback with the New York Mets in 2006. Initially signed to a minor league contract, he worked his way back to the majors, providing the Mets with a veteran presence and occasional bursts of offensive power. His perseverance paid off in 2008 when he played a crucial role in the Mets' lineup, earning the National League Comeback Player of the Year award.