Sources: 49ers' Roman interviewed

STATE COLLEGE, Pa. -- Penn State athletic director Dave Joyner says efforts to replace Bill O'Brien are on "schedule" and he anticipates having a new coach in "a matter of days."

In a statement released by his office Tuesday, Joyner said the search to replace O'Brien, who left last week to become coach of the Houston Texans, is "robust as we anticipated and we have an excellent pool of candidates."

He was not specific about possible candidates but added he has "heard from many coaches, or their representatives, who have expressed their interest in the position."

San Francisco 49ers offensive coordinator Greg Roman interviewed for the job on Monday in Chicago, sources told ESPN's Adam Schefter.

Other reported candidates for the position include Miami coach Al Golden, recently fired Tennessee Titans coach Mike Munchak and Vanderbilt's James Franklin.

Larry Johnson, who has been on staff for 18 years, was named interim coach. He's expressed interest in the job permanently.

Only three coaches, including Johnson, remain on the Nittany Lions' staff.

The Associated Press contributed to this report.