Kiran Bondalapati is co-founder and chief technology officer of ZeroStack, a private cloud platform provider. They seem as anachronistic as helmetless hockey players, the no-dunking rule and bullpen carts. But the player-coach was once a familiar figure in pro sports. Bill Russell and Lenny Wilkens in the NBA. Curly Lambeau and George Halas in football. The first six World Series were won by guys