NEW YORK -- The highlights will show the Yasiel Puig catch, and rightfully so. But the question that Los Angeles Dodgers manager Don Mattingly was pondering after Thursday night's 5-3 loss to the New York Mets concerned his center fielder, not his right fielder.On a night when the Dodgers' defense cost them yet another game and a chance at a three-game sweep, Mattingly openly wondered whether Matt Kemp can be the Gold Glove defender he once was -- and even whether Kemp should continue to be the regular starter in center field.