Ervin Ramon Santana (born Johan Ramon Santana December 12, 1982 in San Cristóbal, Dominican Republic) is a Major League Baseball right-handed starting pitcher for the Los Angeles Angels of Anaheim.

Santana was born Johan Ramon Santana, and used that name throughout his life until 2003. At that time, he decided to change his name to avoid having the same name as pitching star Johan Santana. According to Ervin Santana, "I just came up with Ervin... Ervin Santana, that sounds good."

Santana was a starting pitcher for the Angels' Double-A affiliate, the Arkansas Travelers early in 2005, where he posted a 5-1 record and 2.31 ERA in 7 starts. Following an injury to Angels starting pitcher Kelvim Escobar, Santana earned a promotion. He made his first major league appearance on May 17, 2005 against the Cleveland Indians, in which he gave up the pitching version of the cycle in first four batters that he faced. In his second start, facing the Chicago White Sox's Jon Garland (who at the time had the best record in baseball), Santana bested Garland by pitching a complete game shutout. He gave up only 5 hits and struck out 7 for his first career victory. Santana then went on the disabled list and was sent back down to the minors to the Angels Triple-A affiliate, the Salt Lake Bees.