Reports are rolling in from Jim Wyatt and Terry McComick via Twitter that the team was informed by Jeff Fisher shortly before practice that Mike Heimerdinger has been diagnosed with cancer and will being chemotherapy treatments immediately. Apparently Fisher just found out this morning.
OL coach Mike Munchak and QB coach Dowell Loggains will split Dinger's OC responsibilities, with Loggains looking like the likely playcaller.
I'll update this story as more info becomes available, but the thought and prayers of Titans fans everywhere are with Mike and his family.