Rojas was born in New York City on February 23, 1963, and grew up in Red Hook, Brooklyn.

[1] His early influences included Eddie Palmieri, Willie Colón, and uncles who played percussion and trombone.

[1] "After graduation, he moved back to New York and started to work with a wide variety of musicians in different settings, including bassist Charlie Haden's Liberation Music Orchestra, composer-saxophonist Henry Threadgill's Very Very Circus, trumpeter Lester Bowie's Brass Fantasy.

[3] Rojas formed the trio Spanish Fly with Steven Bernstein and David Tronzo in 1989.

[1] With Bob Belden With David Byrne With Thomas Chapin With Dave Douglas With Spanish Fly With Sting With They Might Be Giants With Henry Threadgill With Loudon Wainwright III With Victor Wooten With John Zorn With others