BULL Y LOS BÚFALOS: An American rock band fronted by singer/songwriter Diego “Bull” Avello — a 6’6” powerhouse from Spain, now based in Nashville after years in Austin, TX. Mix American Rock and Roll with a shot of Spaniard fire and you get “Bull y Los Búfalos.” Think ZZ TOP meets Robert Rodriguez. They call it Stubborn Rock — an unrelenting, powerful sound born from passion, grit, and fierce determination. This isn’t just another band. It’s a one-of-a-kind crossover: a unique sound, a larger-than-life frontman, and a track record that hits both internationally and on U.S. soil.
TV SHOW PLACEMENT: 3 of their songs are featured in FX Network’s MAYANS MC, the Sons of Anarchy spin-off.
TOURS: This is a high-octane, motor-fueled live act. Recent highlights include NASCAR races in Nashville, TN and Daytona Bike Week in Florida. They’ve rocked Harley-Davidson events, biker rallies across the U.S., and a San Antonio Spurs NBA halftime show in Texas. As a Gibson artist, they shared the NAMM 2020 stage in Los Angeles with Billy Gibbons (ZZ Top), Slash (Guns N’ Roses), and Don Felder (Eagles).
Internationally, they’ve headlined the three largest biker festivals in Latin America in México, playing to crowds of more or 25,000 people. In the US, they closed 2022 touring with Ace Frehley of KISS, hit 2023 with 38 Special and Anthony Gomes, and returned to the Midwest in 2024 again with 38 Special and also Lynch Mob.
DISCOGRAPHY: Three studio albums, multiple EPs, singles, and a live album that captures their raw stage power. In 2019, MXD MAG — one of Texas’ top rock publications — named them Best Rock Band in Texas, with Bull taking Best Rock Singer and every member earning top honors. As a fully independent band, they’ve racked up 1M+ music video views and 1M+ Spotify streams. Lead single “Dinero Primero” hit national Active Rock and Alternative radio via the LA Lloyd Rock 30.
NEW ALBUM / VIDEOS: They’ve just recorded a new album in Nashville, TN. “Full Tank of Courage”, likely their best work to date. They plan to release it soon alongside several music videos. The first music video, GHOST, was filmed mainly at the iconic cemetery from the film “The Good, the Bad and the Ugly” in Spain, giving it a fully cinematic character. In addition to the new album and new single-video, they have a music documentary about to be released.
DOCUMENTARY: Diego’s journey is told in the music documentary “I TOOK THE ROAD LESS TRAVELED” premiering at film festivals in 2026. Shot across the USA, Mexico, and Spain, it traces Bull’s path from a small Spanish mountain town to chasing the American dream — with all the hardships, victories, sacrifices and rock and roll way of life. The film is already on the festival circuit and has won 3 AWARDS to date, with more submissions underway.
Stubborn Rock isn’t a genre. It’s a takeover. Bull y Los Búfalos aren’t coming. They’re already here and they play to win. Rock and Roll is for the brave.
Last updated: July 2026.
