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. ↗
Minor league umpires are evaluated in their respective leagues each year and rated numerically. This enables umpires to know where they stand and helps them make prudent career decisions. ↗
Umpires, like players, are expected to show constant improvement each season and at each level. Inconsistent plate work and the inability to handle situations are probably the two biggest problems that minor league umpires face. ↗
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. ↗