Luis Felipe Castillo (born March 10, 1995) is a Dominican professional baseball pitcher in the Seattle Mariners organization.

For the 2017 season, Castillo played for the Low-A Hillsboro Hops, registering a 2.91 ERA with 35 strikeouts in 34.0 innings of work.

He split the 2018 season between the Single-A Kane County Cougars, Hillsboro, and Missoula, accumulating a 2.41 ERA in 24 appearances between the three teams.

[3] He was assigned to the Double-A Amarillo Sod Poodles to begin the 2021 season before receiving a promotion to the Triple-A Reno Aces in June.

On November 10, Castillo was removed from the 40-man roster and sent outright to the Triple–A Toledo; he elected free agency the same day.

[12] On January 28, 2025, Castillo signed a minor league contract with the Seattle Mariners that included an invitation to spring training.