It was not a surprise no Wisconsin Badgers were picked in the NBA Draft. The NBA tends not to value experience and production so much as youth and potential.
Hayes is a fully formed product and while he has a solid floor, his ceiling is more limited because of that. NBA teams would rather gamble on young, raw prospects.
Hayes will not be the first former Badger at this position with the Knicks. Marcus Landry played in 24 games as a reserve for the Knicks in 2009-10. Landry averaged 2.4 Points and 1.1 Rebounds while averaging 6.