Antonio Osuna is a former Mexican professional baseball player who played as a pitcher in Major League Baseball (MLB) for over a decade. He was born on April 12, 1973, in Sinaloa, Mexico, and began his baseball career in the Mexican League before being signed by the Los Angeles Dodgers in 1991.

Osuna made his MLB debut in 1995 with the Dodgers and quickly established himself as a reliable relief pitcher. He had a strong rookie season, finishing with a 2.20 earned run average (ERA) and 11 saves in 45 games. He continued to pitch well for the Dodgers over the next few seasons, earning a reputation as a dependable setup man.

In 1998, Osuna was traded to the Chicago White Sox, where he continued to excel as a relief pitcher. He had a career-best season in 2000, finishing with a 2.63 ERA and 10 saves in 67 games. He also helped the White Sox reach the playoffs that year, pitching in three games in the American League Division Series.

After spending four seasons with the White Sox, Osuna was traded to the New York Yankees in 2001. He pitched well for the Yankees in his first season, finishing with a 2.47 ERA in 34 games. However, he struggled in 2002, posting a 6.75 ERA in 25 games before being traded to the San Diego Padres.

Osuna bounced back with the Padres, finishing the 2002 season with a 2.45 ERA in 25 games. He continued to pitch well for the Padres over the next two seasons, finishing with a 2.45 ERA in 2003 and a 2.45 ERA in 2004. He also recorded his 100th career save in 2004.

Osuna's MLB career came to an end in 2005, when he was released by the Washington Nationals. He finished his career with a 3.68 ERA and 108 saves in 489 games. He also pitched for the Mexican national baseball team, helping them win the gold medal at the 1999 Pan American Games.

Overall, Antonio Osuna had a successful MLB career as a relief pitcher, earning a reputation as a dependable setup man and closer. He was known for his control and ability to induce ground balls, and he was a key contributor to several playoff teams throughout his career.