Cesar Valdez is a professional baseball player who has played for various teams throughout his career. He is a right-handed pitcher who has played in both the Major and Minor Leagues. Valdez began his career in the Minor Leagues, playing for the Arizona Diamondbacks organization. He made his Major League debut in 2010 with the Diamondbacks, but only appeared in two games that season.

After his brief stint with the Diamondbacks, Valdez bounced around between various Minor League teams before eventually making his way to the Mexican League. He played for several teams in the Mexican League, including the Yaquis de Obregon, before returning to the United States to play in the Minor Leagues once again.

In 2017, Valdez signed a Minor League contract with the Toronto Blue Jays. He spent most of the season playing for their Triple-A affiliate, the Buffalo Bisons, but was called up to the Major Leagues in September. Valdez appeared in four games for the Blue Jays that season, posting a 2.70 ERA in 6.2 innings pitched.

Valdez became a free agent after the 2017 season and signed a Minor League contract with the Oakland Athletics. He spent most of the 2018 season playing for their Triple-A affiliate, the Nashville Sounds, but was called up to the Major Leagues in August. Valdez appeared in 11 games for the Athletics that season, posting a 2.19 ERA in 12.1 innings pitched.

After the 2018 season, Valdez signed a Minor League contract with the Baltimore Orioles. He spent most of the 2019 season playing for their Triple-A affiliate, the Norfolk Tides, but was called up to the Major Leagues in August. Valdez appeared in 10 games for the Orioles that season, posting a 5.66 ERA in 20.2 innings pitched.

Valdez became a free agent after the 2019 season and signed a Minor League contract with the Boston Red Sox. He spent most of the 2020 season playing for their Triple-A affiliate, the Pawtucket Red Sox, but was called up to the Major Leagues in September. Valdez appeared in four games for the Red Sox that season, posting a 1.64 ERA in 11.0 innings pitched.

Valdez re-signed with the Red Sox for the 2021 season and began the season with their Triple-A affiliate, the Worcester Red Sox. He was called up to the Major Leagues in May and appeared in 29 games for the Red Sox that season, posting a 3.26 ERA in 30.1 innings pitched.

Overall, Valdez has had a long and varied career in professional baseball. He has played for numerous teams in both the Major and Minor Leagues, as well as in the Mexican League. Despite his journeyman status, Valdez has proven to be a reliable pitcher at both levels and has shown the ability to get outs when called upon.