The Detroit Lions are waiting on Ken Whisenhunt to make a decision about his coaching future. And they might not have to wait long.

ESPN reported Monday morning that Whisenhunt is expected to take a head coaching job within the next 48 hours.

Ken Whisenhunt is expected to take a head coaching job in the next 48 hours. And the Lions are one of two frontrunners to land him.

The San Diego Chargers offensive coordinator has been the hottest head coaching candidate of this offseason, and Detroit is considered the favorite to land him. But ESPN reported the Titans "shouldn't be discounted" either.

Whisenhunt also interviewed with the Browns.

[Related: Why Ken Whisenhunt makes sense for the Lions (and why he wouldn't)]

Detroit is searching for a successor to Jim Schwartz, who was fired after five seasons. Whisenhunt, who once guided Arizona to its only Super Bowl appearance, has been the leader all along.

He has been lauded for sparking quarterback Philip Rivers to a career season this year. Before that, he rode Ben Roethlisberger to a Super Bowl as an offensive coordinator in Pittsburgh, and took the Cardinals all the way to another Super Bowl with an aging Kurt Warner.