Another technique that comes in handy while photographing baseball games is capturing images through a fence. Sports photographers have to rely on this technique so often that they refer to this simply as "TTF" (through the fence). During Sunday's Illini baseball game, I captured several TTF pictures.
And, here's another one from a college baseball game from a couple of seasons ago:
And yet another one from a high school baseball game from last season:

I use the following approach to capture clear images when shooting through a fence:
The longer focal length combined with the selective focus will remove any indications of the fence in most cases!