"I'm sure he's going to fill them full of information, but I think it's very hard to take it and do anything with it," Mularkey told The Associated Press. "You tell them everything. Sometimes it's too much -- information overload."
Wide receiver Justin Blackmon said "there's nothing that he can give away that we don't already change from week to week in the game plan. We're not worried about him being a spy or anything like that."
The espionage chatter is intriguing, but the Jaguars -- spread on the basement floor of the AFC South -- have bigger concerns right now.
Besides, the first order of business for Thomas is picking up the Lions' passing game, which has proven more dynamic and creative than anything the Jaguars have put on the field this season. With or without Thomas, the Jaguars are in a compromised position in 2012.
Follow Marc Sessler on Twitter @MarcSesslerNFL.