I don't know a site that offers what you are looking for but and I haven't tried betting on athletic game also... But about the strategies you're asking, I believe there is none. You just have to know the teams, players, and their records when it comes to their history of being an athlete. For you to be able to win on your bet, make sure you've studied about the players, who's more likely to win, before making your bet.
I don’t know so much about athletes but based on my experience in gambling and if I am to advise anyone I would advise to stay off looking for strategies and focus on game understanding the more. This is applicable for all game types.
I strongly believe that anyone who knows the does- and don’ts of gambling will not be after game strategies that much and I am also very sure that the same level of wisdom and understanding required in sports betting poker and other casino games is what will be needed for this athlete that's if there is any at all. The poster above me has already said it all, research, study and understanding is very vital to winning and becoming successful.