In 2004, he became only the fourth quarterback in NFL history—along with Dan Marino, Dan Fouts, and Phil Simms—to pass for over 400 yards in two consecutive games, a feat that was also accomplished in 2008 by New England Patriots quarterback Matt Cassel, in 2011 by Tom Brady and Cam Newton, and in 2018 by Ryan Fitzpatrick. It was announced on December 17, 2004 that he would be the starting quarterback for the rest of the season for the Titans, replacing the injured Steve McNair. McNair's injuries healed in time for the next season, and Volek backed him up once again, starting only 1 game. McNair was later traded to the Baltimore Ravens during June 2006, allowing Volek the opportunity to truly earn the starting position.