They seem to be freshly morphed toadlets
Quite a ways from adulthood, but more than likely a native species just starting to leave the water.

 

My guess is some sort newly morphed of chorus frog.

 

I thought maybe Pseudacris brachyphona at first, but I think the texture is probably more telling of an American toad and even young Pseudacris typically have more patterning around their eyes (which, admittedly you can't see very well here).

 

Yea, looks like American Toads (Anaxyrus americanus).

 

@Chris S..Me too. A wee little toady.

 

Because of locality variation and chromatophore changes, looking at the "hardscape features" of morphlets is more telling than color or markings.

Morphological features may be diminutized in babies, but they are there from day one, everyday in all temps.

 

Definitely - structure beats color & pattern, every time. Are there paratoid glands? Bufonid. Are there expanded toe tips? Hylid. Etc.

Metamorphs are not as awful to try and ID as larvae (OMG PITA), but give those little guys a month and it'll be way, way easier to tell what they are. Of course, they'll also be long gone, so you'll never know. Ha ha. You could always see about the legality of collecting a couple and raising them out.

Alternatively, you could just learn what's native to your area (hint - it's a perfectly reasonable number of anuran species, anybody can lean them within an hour - nothing like birds, by way of comparison), and just start paying attention. Those metamorphs haven't travelled far yet - if the pond stays wet, you will see and hear adult breeders, and then eggs, in there next early spring, and then you'll know whose babies you see a few weeks or months after them. Here's a place to see what's native to your area:
Maryland Amphibian & Reptile Atlas Project

 

The timing of emergence is indicative as well, this would not be a Lithobates or Hylidae for example.

 

Excellent point

 

Not an expert, but local. My first impression is that they are Eastern Spadefoot Toads...that face (Scaphiopus holbrookii).

 

Another way to get some ID help - post these on iNaturalist.