As if the Giants didn’t have enough to worry about, now there’s the Wild Frog, Norv Turner’s variation on the Wildcat. The Frog is named either after LaDainian Tomlinson’s Texas Christian alma mater or Turner’s first coaching gig at Calaveras County College; either way, the threat is real, because Tomlinson has thrown seven career touchdown passes and can do more than run off-tackle after a direct snap. A more pressing fear than the reign of toads is the state of Giants’ phyllo-thin secondary: the Chargers rank fourth in the N.F.L. with 276.3 yards per game. The team that had no answers for Leonard Weaver and Brent Celek must find some for Tomlinson and Antonio Gates. One positive note: the Giants don’t have to worry about Chris Chambers, who briefly joined Edgerrin James on the Unemployed All-Pro team (managed by George Kokinis) before joining the Chiefs.