Robert Cory "Bob" Bryar (born December 31, 1979) is an American musician and sound engineer best known as the drummer of the rock band My Chemical Romance from 2004 until his departure in 2010.

Bryar joined the band in 2004, replacing former drummer Matt Pelissier shortly after the release of their second studio album Three Cheers for Sweet Revenge. He performed on all of the subsequent releases in support of the album, as well as the band's commercially successful concept album, The Black Parade (2006). Despite suffering numerous injuries while on tour, Bryar continued to tour with the band and joined them in the studio to record their fourth studio album before departing from My Chemical Romance in 2010. His most recent contribution was performing on the band's final release before their break-up in 2013, Conventional Weapons. After his departure from the band, Bryar became a behind-the-scenes figure in tours for several bands before retiring from music in 2014.

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