Washington Nationals beef up roster of amenities, luxury suites, promos and food (Video)

The Washington Nationals have added 15 new sponsors and partners at Nationals Park with an eye on boosting the fan experience — with new amenities, luxury suites, food, merchandise options, game-day promotions and beefed-up security. And in a nod to the players, there's also new turf on the diamond. The organization detailed the changes Wednesday in a media tour at the stadium. Buffalo Wild Wings, Chipotle, Chik-fil-A, Under Armour, even companies that don't sell directly to consumers — such…