The Pittsburgh Steelers plan to name Minnesota Vikings defensive coordinator Mike Tomlin as their new head coach, ESPN's Chris Mortensen confirmed Saturday night. Sources told Mortensen that the team would announce Tomlin as coach either Sunday or Monday. Tomlin would become only the third Steelers coach in 38 years, and the first black head coach in their 74-year history. Tomlin, a former Tampa Bay assistant, has been the coordinator for just one season under Brad Childress in Minnesota. Before that, he was a Buccaneers' secondary coach, a five-year spell that included installation of the teams' trademark "Tampa-2" scheme. He was an assistant coach in the collegiate ranks from 1995 to 2000. Sports Illustrated's Web site, SI.com, first reported that Pittsburgh had decided on Tomlin earlier Saturday. Steelers owner Dan Rooney told The Associated Press he had no comment. Team president Art Rooney II, leaving the team's practice complex Saturday, said he had nothing to say. A person with knowledge of the search denied Tomlin has been hired, telling the AP that not only has the job not been offered but there have been no contract negotiations.