He was a founding member and the original drummer, in December 1966, for Sly & The Family Stone, and in 1971 he became the first member to quit the group, citing the band's continuing turmoil.[3] As a member of Sly and the Family Stone, Errico played at Woodstock music festival in 1969.
Errico toured with jazz-fusion group Weather Report in 1973/74, but never made a studio recording with the group. His performances can be heard on live recordings hosted at the website Wolfgang's Vault. Joe Zawinul said that no one could play his tune "Boogie Woogie Waltz" better than Errico had.
Errico later collaborated with bands such as Santana, on Carlos Santana and Buddy Miles Live, released June 7, 1972, and with the Grateful Dead. In 1974 he began drumming for the Jerry Garcia Band on and off thru 1984. He also worked with Larry Graham (from Sly & The Family Stone) plus members of the Tower of Power horns, Journey and the Pointer Sisters on the first album for Betty Davis; Errico produced and drummed. He also produced and drummed on the only album by Ike White (Changing Times).
One of his recent projects was producing the Jamie Davis big band album. He also played at the 2006 Grammy Awards, in the Sly & the Family Stone tribute, alongside most of his former bandmates. In recent years he has played drums for the reformed Quicksilver Messenger Service.
He was inducted into the Rock and Roll Hall of Fame in 1993. He continued to tour, with The Family Stone, alongside fellow founding member of Sly and the Family Stone Jerry Martini (saxophone). This band also included former Sly and the Family Stone member Cynthia Robinson (trumpet) before she died in 2015.[5]
Errico's intricate drumming, particularly with Sly & the Family Stone, has been sampled on hundreds of occasions by hip hop producers over the years.[6]
A 2014 scientific paper states that Errico is the musician with the highest degree and PageRank centralities, and the second highest Eigenvector centrality, of all musicians of all time.[7]
