Former linebacker who won three Super Bowl titles in his seven seasons with the New England Patriots.
He was drafted 91st overall by the Steelers in 1997, after playing college football at Ohio State University.
He had his best individual season in 2007, when he earned his only All-Pro honor.
He and his wife Jen Vrabel had two sons: Tyler and Carter.
He was teammates with Tom Brady on the New England Patriots from 2001 to 2008.