Brian Christopher Fuentes (pronounced /ˈfwɛntɨs/) (born August 9, 1975 in Merced, California) is a Major League Baseball relief pitcher for the Los Angeles Angels of Anaheim. Previously, he played for the Seattle Mariners and the Colorado Rockies. He bats and throws left-handed.

Fuentes attended high school at Merced High School in Merced, California. After graduating from high school, Fuentes attended Merced Junior college.

Fuentes was drafted by the Seattle Mariners in the 25th round of the 1995 amateur draft. He spent one season for the Mariners appearing in ten games.