Shanahan, 62, has spent the 2014 season out of football after being fired by the Redskins in December 2013. Shanahan took a sterling resume to Washington -- including two Super Bowl wins with the Broncos -- but finished 24-40 in four seasons with the Redskins. Three of his four double-digit loss seasons in 20 years as a head coach came in D.C.
Shanahan's son, Kyle, the Browns' offensive coordinator, is also under consideration for the Niners' job.
The tack-on feel of Shanahan's interview makes you wonder if this is merely a kick-the-tires move by the 49ers. Then again, Shanahan has the rings, franchise connection, and as recently as two years ago, was being lauded as a rejuvenated offensive mastermind during Robert Griffin III's electric rookie year.
A lot has changed since then, of course. Be sure to follow our coaching visits tracker to stay up to date on the movements of the Niners and other teams with prominent vacancies.