Bat Ball Boy

It looks like Bat Boy has moved on from James Blake to another famous tennis player: Andre Agassi.
Although Agassi retired in 2006, he continues to play charity tournaments. It has been long whispered that Agassi is often found immediately after the game, catching mosquitoes in the parking lot with a dark, pointy-eared figure.
What could Bat Boy possibly have to gain from a retired athlete? The plot thickens…