PDA's #1 seeded U15 team was upset by the #22 seeded SC del Sol team in their second playoff game. The RPI saw PDA's weakness.The USSDA numbers are the DA playoff seedings, which are based strictly on points/game (and tiebreakers). My ranking is an RPI (the same formula NCAA uses for soccer). The difference is primarily strength of schedule. PDA's U15 team may be a #1 seed in the playoffs, but with a #11 in RPI they are not quite the favorite they appear to be. We'll see how this all actually plays out though.