Jackson Koivun is a PGA Tour winner in three starts and needs time to see where he goes

For a sport with a reputation for moving slowly, golf always seems to be in a hurry to appoint the next big star.Jackson Koivun is next on the list and certainly worth watching.It's not just because he won a PGA Tour event — which included the No. 1 player in the world — just two months after leaving college. Remember, it was only two years ago when Nick Dunlap won The American Express (Scottie Scheffler played that one, too) while he was a sophomore at Alabama.Different about Koivun is that he carried the expectations of being the No. 1 amateur in the world. He won six times in college, swept all the awards as the best player, led Auburn to another NCAA title and last year had three straight top-10 finishes in PGA Tour events without ever looking as though the moment was too big.And then