What is your budget?
Any reason for sticking to those 2 models?
Are you shooting any indoor gym or outdoor night games under lights?
This generally calls for HIGH ISO capability.
What lenses do you have?
The lens you have affects how high you need to raise the ISO. A slow kit lens will require a higher ISO setting than a FAST pro or prime lens.
For the various sports, where are you sitting/positioned, relative to the players you are shooting?
More outdoor than indoor, on the sidelines for our sons football games.
Indoor will be wrestling and basketball, again pretty close. All youth sports.
Budget would be under $900-$1,000.
Below are the lenses I have.
View attachment 166378View attachment 166379
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How old is your son?
I don't know how to interpret "youth sports," late elementary, middle school, or high school?
Age affects how FAST they move; varsity high school moves a lot faster than pop-warner.
Even in high school, there is a BIG difference between the freshman and the varsity teams, and the JV and varsity teams.
Is the football during the day or night?
At my high school, football starts at 4:30pm for JV (transitions from sun to dark and under lights) and 7:30 for Varsity. So Varsity is always at night under lights

If your son is in HS or close to it, he may end up playing at night under lights, so that should be a consideration.
Wresting is indoors but slower moving.
Basketball is indoors and fast.
Both of your lenses should be OK, unless you push it.
Neither lens is particularly good under low light conditions. But that is the nature of consumer lenses.
The faster PRO lenses are generally more expensive, sometimes very EXPENSIVE. Though there are exceptions.
I would go with a D5600 or D7200.
My own setup is: D7200 + 18-140.
Or a D5600 + 18-140.
Or buy the body alone, and use your old lenses.
I use the 18-140 on the football sidelines, for day games. It has enough reach to get almost across the field, and is wide enough to handle the action when they come close. But it is a bit slow for night games, where I have to crank up the ISO to 12800.
Your 55-300 would work fine on the field, except when they come in close. Similar to the 18-140 it will be fine during the day, but will struggle in night games.
While I have used the 18-140 in the gym, I was fighting the low light. I had to raise the ISO to 12800. Your 18-55 will work also, at a high ISO.
For basketball, I would get either:
- The Nikon 35/1.8 prime lens (this is the lens that I currently use for basketball on my D7200)
- Tamron 17-50/2.8 zoom. (The similar Sigma lens, the zoom ring turns in the opposite direction than Nikon zooms, confusing
).
Either lens should work for wrestling also. But it has been years since I shot high school wrestling.
If you get the D5600 body only, you will have enough left to buy the Tamron 17-50/2.8 and meet your budget.
And use your 55-300 for daytime football.
My own preference, as I bought it, is the D7200.