NEW YORK--Yankees shortstop Derek Jeter was spotted in a New York City night club last night explaining the limitations and shortcomings of defensive metrics to a potential groupie, witnesses reported. The woman, who appeared skeptical at first, did reportedly leave the club with Jeter. “I overheard the whole conversation,” said the witness, who worked at the club. “He was like ‘Come on, baby. You know defensive metrics are inherently flawed. It’s near impossible to quantify with any accuracy the value of a player’s defense. There are just too many variables. Trust me, Once you get back to my place you'll forget about my disappointing FRAA pretty quickly.”