Sad Maple

[Cyndi]

My golden maple has this weird spotting. Is it a fungus? I planted it last year and it didn't have the brown markings. I don't think it's sunburn. It hasn't gotten overly dry or too hot. All of the leaves have it. It's been a mild, wet spring.

 

[Shadowscape]

You might find something in this that will help you:

8 Common Princeton Gold Maple Tree Problems - How To Resolve

How will you feel if you get your Princeton gold maple tree in trouble? It may be leaf problems, winter damage, root injury, transplant shock, dieback, poor growth, insect attack, or disease occurrence. Overwatering, too much light, imbalanced temperature, low humidity, nutrient deficiency, and...

plantandpest.com

Could be the wet. Can you also show us a photo of the ground around the base? Looks a bit odd in the photo above.

 

[Cyndi]

Could be over watering I guess.

 

[Shadowscape]

That would be my guess.

 

[southsoundtree]

Your root collar looks buried, at the least by a little bit.

Not the issue now, but if you like the tree, it's worth removing the excess soil.

 

[Shadowscape]

I would stop with the hose stuff. It is not like you just planted it and need to soak the ground. You said it has been wet. That with your watering (you have a gully going there) is more than likely your trouble. At this point it should be fine on its own without the need for your help in terms of water. Save that for a drought year.
And do as @southsoundtree mentioned above.

 

[Cyndi]

Awesome. Thanks so much. I'll clear the collar a bit and stop drowning the poor thing.

 

[KTSmith]

I'm really unfamiliar with golden maple, but some of the leaves show classic interveinal bronzing. That symptom usually indicates a nutrient deficiency as noted above by L3VI. I'd add magnesium deficiency too.
But it doesn't end there! Too much of even an essential chemical element can be toxic and induce bronzing, such as iron. Too much sodium can induce bronzing in tree leaves. No need to guess. If the trees are important, time for a soil chemistry test.
Keep in mind that environmental conditions affect availability of elements to the plant (soil type, waterlogged-ness, pH, etc.)
I know I'm late to this and the party moves on, but the interveinal bronzing is textbook.