They only have 1 loss and won a power 5 conference.
Of the 4 teams, the one that is iffy is OSU. People can make a valid argument why they shouldn't be in, although personally I think they should be. They're one of the top 4 teams in the country even though they didn't win their conference. The Buckeyes should have been seated No. 4 and UW should have been No. 3.