ST. LOUIS — Gregg Williams considers Jeff Fisher one of his closest friends. When asked to join the St. Louis Rams staff, he could not say no.

As for new offensive coordinator Brian Schottenheimer, there's the enticement of working with Sam Bradford, the No. 1 pick of the 2010 draft.

Williams has 22 years of coaching experience in the NFL, including six as Fisher's defensive coordinator with the Tennessee Titans, and left the 13-win Saints for the two-win Rams because of Fisher. One of the things Williams likes most about Fisher is his calmness under fire.

Williams promises a culture change with a team that ranked near the bottom of the NFL against the run and often faded late under the pressure of keeping the NFL's worst offense in the game.