Francis Euclides Martes Suazo (born November 24, 1995) is a Dominican professional baseball pitcher who is a free agent.

He made his professional debut in 2013 with the Dominican Summer League Marlins, logging a 3–3 record and 3.04 ERA in 12 appearances.

On July 31, 2014, Martes along with Colin Moran and Jake Marisnick were traded from the Marlins to the Houston Astros for Jarred Cosart, Enrique Hernández and Austin Wates.

[10] On March 12, 2019, Martes was suspended for 80 games for using clomiphene in a violation of the MLB Joint Drug Prevention & Treatment program.

[11] On February 17, 2020, Martes was suspended for 162 games for another violation of the MLB Joint Drug Prevention & Treatment program, this time for using boldenone.

[13] After struggling to an 0–3 record and 10.80 ERA in 7 appearances with Sugar Land, Martes was designated for assignment by Houston on June 30.