Zierlein was supposed to meet with some of his linemen Wednesday, only to be told he was being replaced. He was seen leaving the Steelers' offices with several large boxes.
Offensive coordinator Bruce Arians held a long meeting with Tomlin on Wednesday and is expected to retain his job, despite some dissatisfaction within the organization about the decreased emphasis on the running game.
The coaching change was the second in the last two days after Tomlin went three seasons without altering his staff. Quarterbacks coach Ken Anderson retired Tuesday after 33 seasons as an NFL player or coach, 16 as a Cincinnati Bengals quarterback.
Copyright 2010 by The Associated Press