allowing ANY downloads and you have just set your self up for failure. They will still screenshot them with watermarks when you dont allow it, but there is nothing you can do about that. I have gotten away from action shots this last few months as too many parents have decent cameras and lenses, and they have ALL season to get a good shot of junior. I always did action shots as mpix fullfilled, and just swapped the image when an order was made to the full size. On my T&I stuff, i set up self fullfillment and I use millers (mpix's wholesale/pro side) for orders. They have minimum $ amounts and require tax id's etc, so unless you do a volume business, mpix will be fine. If they want the photo, they will pay.
The market you are in is tough from several aspects. the already mentioned parents with good gear (who also give away shots to other parents who dont have the stuff), teams/leagues who want big $$ cuts of your sales, other shooters undercutting you, leagues who refuse to do exclusive contracts to run off the other shooters, etc. If your using products they (parents) can get at any lab, they wont sell. I would suggest not selling 4x6's of action shots. When I made 5x7 my smallest, and priced them very close to my 8x10's ($7 and $11 respectively) I started doing better sales too, because they bought much better margined 8x10's.Get the photos up FAST too. If its a day game, they better be up that night. If its a night game, they need to be up by the next morning. If they come to your site the same/nex ay and photos arent up, there is a 90% chance they wont come back. this is an impulse buy on a luxury good. You dont get second chances with it.
You have some great stuff there, but do yourself a favor, hide the exif data and file names etc. put a watermark on them all. Also, instill urgency by locking out galleries after 15 days. I always made money after I closed a gallery. Parents couldnt look at the free slideshow at work anymore and then bought something...Even then I still had parents calling asking how to get the "proof" off of the screenshot photo they stole, and bugging me with calls etc about how those camera settings didnt work for them.. Remember your not selling photography, but rather photographic services. If you intend to sell and make money, you cant be the "nice guy" to everyone anymore, because they will consume your time without paying for it.
I have some unique products right now that have been a HUGE success.
You can see my latest T&I set on my home page under 2009 Eagles.