Odell Beckham’s head spinning after “A-list” offseason

A year ago, Odell Beckham was a promising rookie receiver in Giants camp with problematic hamstrings. Now he’s Odell Beckham, and it’s taken him an offseason to come to grips with his newfound fame. “Definitely been fun,’’ the Giants wide receiver said, via Paul Schwartz of the New York Post. “I say fun because it’s the…