I'd always have grease in at least two places, in case the umpires would ask me to wipe one off. I never wanted to be caught out there with anything though, it wouldn't be professional. ↗
People come out to see the players. When do you see a manager anyway? When he's out on the field arguing with the umpires, making a fool of himself and you know you can't win, and when he brings out the line-up card. ↗
The most cowardly thing in the world is blaming mistakes upon the umpires. Too many managers strut around on the field trying to manage the umpires instead of their teams. ↗
As all of us with any involvement in sports knows, no two umpires or no two referees have the same strike zone or call the same kind of a basketball game. ↗