I think something might be lost in translation

Keeling Pilaro was a high-school boy playing field hockey on an all-girls team. That is no longer a reality.

“They told me I wasn’t allowed to play because I had advanced skills that I learned in Ireland,” Keeling told CBS 2′s Jennifer McLogan.
Mona Rivera of 1010 WINS also talked to Pilaro, who told her, “They told me because I have an adverse effect…and…but they didn’t even explain what the adverse effect was, so that’s what I’m kind of confused about.”

That’s a very kind way of saying you can’t play on this team because of your penis. Which may have an adverse effect on the girls.