Slot - The slot is the space between the batter and the catcher. Your inside eye should be just off the inside edge of the plate with the bottom of your chin no lower than the top of the catcher’s helmet. This way if a pitch comes straight at you and explodes in your face, you know it’s a ball.
Position A – With no runners on base the base umpire will line up with both feet in foul territory facing home plate; Right foot next to foul line, 10 - 15 feet behind 1st base or the 1st baseman and no further than the edge of outfield grass.
Position B – With a runner on 1st or runners on 1st and 3rd the base umpire will position himself midway between the back edge of pitchers mound and the 2nd base cutout, facing home plate and on a tangent line between home plate and the right edge of the mound (1st base side)
Position C - With a runner on 2nd or runners on 2nd and 3rd or 1st and 2nd or 1st, 2nd and 3rd the base umpire will position himself midway between the back edge of pitchers mound and the 2nd base cutout, facing home plate and on a tangent line between home plate and the left edge of the mound (3rd base side)
The “V”- An area defined by a line drawn from the center of the pitchers mound through the left fielder (F7) to the outfield fence and a line drawn from the center of the pitchers mound through the right fielder (F9) to the outfield fence. This triangular area is often referred to as the “V.”
Working Area – The area in the infield grass directly behind the mound and in front of the second base cutout.
Trouble ball - Home runs, fair/foul decisions, ball off the outfield wall, diving catches, more than one player converging to make the catch, catches made by the outfielder with his back towards the infield, catches below his waist on a full run.
Pivot- A cross over step used by the base umpire to observe batter runner’s touch of first base.
Cut Out – An area that has been cut out of the infield grass, usually a circular shape, directly in front of the bases and in fair territory
“Can of corn” – Routine fly ball.
“Banger” – An extremely close force play usually at first base.
“Train Wreck” – Any situation where a runner and a fielder violently collide without committing obstruction, interference or malicious contact.
“Deek” - A legal play by the defense usually designed to confuse the runner (usually a fake overthrow or covering a base as if a throw is approaching but NOT A FAKE TAG! A fake tag is obstruction.).
Ready Position – The position and umpire takes before every call on the bases. Feet shoulder width apart, hands on knees, back flat and head up completely still, ready to stand and make the call.
Acronyms and abbreviations: TOP- Time of Pitch; TOT- Time of throw; WP- Wild pitch; PB- Past ball; BB- Base on Balls; HP- Hit by pitch; F1- Pitcher, F2- Catcher, F3- First baseman, F4- 2nd baseman, F5- 3rd baseman, F6- Shortstop, F7- Left fielder, F8- Centerfielder, F9- Right fielder;