Mechanical Bulletins
Mechanical Bulletins contain information pertaining to umpire issues, mechanics and rotations. Following a review of reports from umpires returning from International competitions and our own inconsistencies across the country in relation to mechanics, the following memos and various National Umpiring Program Mechanic Bulletins will dictate how mechanics are to be used across the country.
| Date released | Bulletin id | Title | Size |
|---|---|---|---|
| 2017 October | MB-2017-1 | Three/Four Umpire System – Umpire Mechanic Changes | (112kB) |
| 2011 December | MB-2011-1 | Three Umpire System – Outfield Mechanics | (112kB) |
| 2009 November | MB-2009-10 | Infield Fly Mechanic | (126kB) |
| 2009 October | MB-2009-8 | Inside / Outside Theory | (201kB) |
| 2009 October | MB-2009-6 | Third Strike and Trapped Balls | (185kB) |
| 2009 October | MB-2009-5 | Outfield Corrections | (142kB) |
| 2009 October | MB-2009-4 | Check Swing | (184kB) |
| 2009 October | MB-2009-3 | Plate Work | (215kB) |
| 2009 October | MB-2009-2 | Count Signal | (150kB) |
| 2009 October | MB-2009-1 | Vocals | (188kB) |
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