Answer: umps

AnswerCrossword Clue
UMPSBallpark bosses
UMPSTag determiners
UMPSWorld Series sextet
UMPSOut callers
UMPSSome Little League volunteers
UMPSBallpark arbiters
UMPSDiamond figures
UMPSOfficials at home?
UMPSShea officials
UMPSCalls balls
UMPSDiamond judges
UMPSMasked men at home?
UMPSBasketball : refs :: baseball : ...
UMPSCall makers at the plate
UMPSDiamond VIPs
UMPSField officials
UMPSHome boys?
UMPSOfficials at the plate
UMPSThey call out "Out!"
UMPSBaseball VIPs
umpsUMP, to umpire (to rule on the plays in a game)
UMPSDiamond staffers
UMPSWorks at home?
UMPSThey clean plates
UMPSThey're frequently "blind"
UMPSVIP's of the diamond
UMPSStrike callers
UMPSDiamond arbiters
UMPSDiamond rulers
UMPSFigures at plates
UMPSFenway arbiters
UMPSReferee's kin
UMPSFace-mask wearers
UMPSBoo targets, sometimes
UMPSTargets of 54-Acrosses
UMPSCalls the game
UMPSFoul callers
UMPSBallpark figures
UMPSMen in black, usually
UMPSThey're usually assigned to bases