I get ask this question a lot. “What gear do you have?”… I have a lot of gear I don’t use often or don’t use anymore, but here is what I almost always pack when I travel to shoot an event or competition. I have a pretty good set of gear that allows me to do everything I want without having to carry too many lenses or equipment.
-D3 body (not shown)
-TC20E (2x teleconverter)
-Sekonic Lightmeter L758DR
-2-3 camera batteries + charger
-2-3 Pocket Wizard PlusII
-2-3 CF cards (16g each), some clear filters, cleaning kits, etc.
-At least a monopod, if I have my 200-400 most times I will have a tripod.
An important disclaimer is that I think you can shoot most sports with a decent body and the 70-200 F2.8. That lens is so versatile and sharp and offers a relatively cheap alternative. You can use is with a teleconverter if you need more reach and the F2.8 makes it still pretty good at F4.