Named for its creator, my colleague Keith Hernandez, the Mex Burger… oh, I’ll admit it: I just wanted to say “my colleague Keith Hernandez” to make it sound like sometimes I run into Keith Hernandez at the coffee machine and gossip or rap on the TV shows we watched the night before. But that doesn’t really happen, since Keith doesn’t come to the office all that often.

The Mex Burger is a burger with bacon, two slices of cheese — one pepper jack, one cheddar — guacamole, jalapenos and chipotle aioli on a brioche bun. It costs $10 and is available from the “Keith’s Grill” concession on the field level in left field. It looks like this:

It’s pretty damn good. I mean first of all, Keith Hernandez isn’t going to put his name on an inferior burger. Second, it’s got bacon, guacamole and two types of cheese. There’s only so wrong that could go.

The guac is good, too — better and fresher tasting than I expected would be distributed in a stadium. It’s not on par with the stuff they make at your table at Dos Caminos or whatever, but, well, c’mon. It’s a ballpark. And there’s bacon.

But a couple of quibbles: The double-cheese makes this a pretty greasy burger. And despite the fresh jalapenos, pepper jack and chipotle aioli, it’s really not very spicy. A few bites might be called mildly spicy, but there’s no way this burger would get more than one little red pepper on a Thai food menu.

Also, there’s a little too much bun, so the burger gets pretty bready.

The biggest issue of all, of course, is that Keith’s Grill is about 100 yards away from Citi Field’s Shake Shack location. And like most burgers available in the world, the Mex Burger can’t hold a candle to the Single Shack. It’s a decent substitute if you’re unwilling to brave the Shake Shack line, but not a burger you’d write home about unless your parents happen to read your blog post abouts Citi Field sandwiches.