Did he just say alphas don't have pheromones or did I read it wrong?

Yes, in this omegaverse alphas don't emit pheromones. In sport alphas took medicine so they do not react to omegas, bc they can go into rut and it's decreasing their performance. Something like that

Ah I see. That's interesting.

They also take a medication or something that makes their scent not work (in a way) so that they can't use it against their competition to win, it's way to make the sports a fair game