For the record, all 3 of O'Connell, Chiazza, and Kissinger are considered top 40 refs by the NCAA. They all worked the Sweet 16 this past season. Kissinger even worked the Final Four, so he's considered a top 20 ref (and he worked the Elite 8 the year before and has a couple other E8/F4s in the past). O'Connell has worked the Sweet 16 3/4 past tournaments, but has not worked the E8/F4 in that timeframe. Chiazza didn't get out of the round of 32 until this last season (at least in the years I looked).