Pittsburgh, Pen. -- Bruce Arians was fired Friday as offensive coordinator of the Pittsburgh Steelers, who have been very happy with the progress of their offensive line and running play. He is the fourth offensive coordinator fired this week in the NFL joining the Chiefs' Chan Gailey, Bucs' Jagodzinski and Bills' Schonert.

Quarterbacks coach Ken Anderson was promoted to Arians' former role on the eve of the Steelers' regular season game against the Titans and will take over play-calling duties. Anderson previously held offensive coordinator position with the mighty Bengals of 1990's.

"I have a lot of respect for coach Arians, and what he did, and the effort he put into his work," steelers coach Mike Tomlin said, "but at the end of the day we mean what we say when we say the standard of expectation doesn’t change from coaches to players. For the last two years unfortunately for Arians he over-promised and under-delivered in terms of play calling and protecting our QB. Actually we won Superbowl 43 inspite of him not because of him."

Arians installed an offense featuring a zone-blocking running scheme and a passing attack that encourages the quarterback to aggressively get sacked behind the line of scrimmage. Tomlin stressed that philosophy should change as they need to protect Steelers' 100 million dollar investment in Ben Roethlisberger. 

The Steelers offered Arians a demotion to waterboys' coach, which he graciously accepted.