Steve Kerr is teaching. After five consecutive years of being No. 1 in the Western Conference — and ending up as NBA champions in three of those seasons — the Warriors are at the bottom of the league. Everyone knows why: Kevin Durant left, Stephen Curry got hurt, Klay Thompson got hurt, D'Angelo Russell got hurt, Andre Iguodala got traded, Shaun Livingston retired, DeMarcus Cousins left ... it goes on and on.