Juan Carlos Ramírez (born August 16, 1988) is a Nicaraguan professional baseball pitcher who is a free agent.

He has previously played in Major League Baseball (MLB) for the Philadelphia Phillies, Arizona Diamondbacks, Seattle Mariners, Cincinnati Reds, and Los Angeles Angels, and in the Chinese Professional Baseball League (CPBL) for the Fubon Guardians.

[1] On December 16, 2009, Ramírez was traded with Phillippe Aumont and Tyson Gillies to the Philadelphia Phillies in exchange for Cliff Lee.

[4] On June 22, Ramirez's contract was selected and was called up to the Phillies after Mike Adams was placed on the disabled list.

He made his MLB debut on June 23 in a game against the New York Mets, and struck out the side with his fastball velocity reaching as high as 98 MPH over one inning.

On October 16, Ramírez was removed from the 40-man roster and sent outright to the Triple-A Lehigh Valley IronPigs.

On May 25, Ramírez suffered his first loss since 2013, surrendering a walk-off home run to Jhonny Peralta.

In 2017, Ramírez began the season out of the bullpen, but due to numerous injuries to the Angels rotation he was pushed to a starting role.

Ramírez tore his UCL in his throwing elbow and underwent Tommy John surgery after only 2 starts for the 2018 season.

[19] On December 28, 2020, Ramírez signed with the Fubon Guardians of the Chinese Professional Baseball League for the 2021 season.

[21] On July 13, 2021, Ramírez signed with the Diablos Rojos del México of the Mexican League.

Ramírez failed to make Saltillo's Opening Day roster for the 2024 season and was released on April 6, 2024.