Well this is terrifying.

During Monday night's Astros-Orioles game at Minute Maid park, a fan reached for a foul ball, and in doing so revealed a concealed firearm tucked into his waistband. Here's a still photo via Andrew Joseph of the Arizona Republic:

And here's video of the fan reaching for the ball, then reaching for his shirt to cover the weapon:

It is legal in Texas to carry a concealed firearm with a permit, but firearms are banned at MLB ballparks. Minute Maid Park's website specifically lists "Weapons - including but not limited to firearms, knives, mace" as forbidden.

Obviously the video raises concerns about MLB's security protocols. MLB ramped up security this year and had all 30 clubs install metal detectors this season, yet here's a fan carrying a gun.

As Joseph notes, the man could have been an off-duty or plain clothes police officer. Hopefully that is the case.

Update: The Astros released the following statement on Tuesday:

Phew, that's much better.