Pat Mastelotto is an American drummer and percussionist, best known for his work with the progressive rock band King Crimson. He joined the band in 1994 and has contributed to several of their albums and tours, showcasing his unique drumming style that blends rock, jazz, and experimental music. In addition to his work with King Crimson, Mastelotto has collaborated with various artists and bands, including Mr. Mister and The Rembrandts. He is recognized for his innovative use of electronic drums and his ability to adapt to different musical genres, making him a versatile figure in the music industry.