OK, I'm a Buffalo wings guy, the ones at the ESPN are not that great. I've had every level of wings there including one that I told the waiter to tell the chef they couldn't make them hot enough to pour on the sauce. They are OK, but nothing great.
The Patriots Clam Chowder (or as I call it the THREE time World Champion Patriots) is very good. Being from NH, I am very picky about "New England" clam chowder.
I really haven't had a dissapointing meal there yet, and that goes well beyond the burgers. Best time to go is around 4:00pm, no crowds and fast service. Anytime after that there is usually a long wait.
Full menu is available at the bar.
You have to realize that the ESPN Zone is a Sports Bar first. So don't go in expecting a great meal. If your expectations are high, go somewhere else. If you are looking for a good, quick meal it's a good call.