Hello and welcome to the forum,


I think the 70-200mm f/2.8L IS II would be an excellent choice. The next best lens to purchase would be the 300mm f/2.8L IS bare and/or with extender if needed and funds allow it. This way you will have excellent optics and reach from 70mm f/2.8 all the way up to (300mm f/2.8 + 1.4X) 420mm f/4. If not then you could probably shoot most events with the 70-200mm f/2.8L IS II plus 1.4X and use the 2X extender in a pinch.


Or you could use what I'm using for my "Fantasy Baseball League" the 200-400mm f/4L with 1.4x extender built in. []


Rich