Bryar joined My Chemical Romance in 2004, shortly after the release of their iconic album Three Cheers for Sweet Revenge. He replaced Matt Pelissier as the band's drummer and played a pivotal role in the creation of The Black Parade (2006) and Danger Days: The True Lives of the Fabulous Killjoys (2010). However, he parted ways with the band before the release of Danger Days.
After leaving My Chemical Romance, Bryar explored other musical projects and later moved into real estate. In 2020, he reunited with the band to pay tribute to Neil Peart, the legendary drummer of Rush, a tribute that showcased his deep respect for the rock icon.
While he had been absent from recent MCR tours, Bryar had previously opened up on social media about his struggles with mental health, including thoughts of suicide, which worried many of his followers. His death has left the rock community mourning the loss of a talented and cherished musician.