Ken Whisenhunt will make his decision on a head coaching destination within the next 48 hours, per a report from ESPN’s Adam Schefter on Monday morning.

Whisenhunt is believed to be the Detroit Lions’ top candidate to replace Jim Schwartz who was fired two weeks ago. It is not a lock that he will land in Detroit.

“The Titans cannot be discounted in this situation,’’ Schefter said on ESPN.

Whisenhunt became immediately available after the San Diego Chargers lost to the Broncos at Denver on Sunday night. Whisenhunt was the offensive coordinator there this season following six seasons as the head coach of the Arizona Cardinals.

He is spending Monday in regular end-of-season meetings with the Chargers in San Diego according to a report by Jason La Canfora, CBS sports’ NFL insider.

The Lions have an advantage in at least one position with Matthew Stafford at quarterback. Jake Locker is a question mark in Tennessee and the Browns don’t have a franchise quarterback. 

If Whisenhunt decides not to sign with the Lions, Mike Munchak could be a possibility. ESPN’s Chris Mortensen reported over the weekend that Munchak had a good interview with the Lions’ brass.

The Lions also interviewed Jim Caldwell, the Ravens offensive coordinator, and Gary Kubiak, former Houston Texans coach.

(Follow @PaulaPasche on Twitter. Order her book,  “100 Things Lions Fans Should Know & Do Before They Die’’ here. It’s also available at bookstores.)