All scheduling information, including weather cancellations, is available at The Arbiter. Rainout information is also available at:
- (301)-579-5610 — weather hotline for most Montgomery County fields
- (301)-260-9004 — weather hotline for the Olney Boys and Girls Club (OBGC)
- (240)-805-1139 — weather hotline for Kelly Park and other Gaithersburg area fields
- (240)-314-5055 — weather hotline for Rockville fields (Dogwood Park, Mark Twain, Monument Park)
- (240)-777-6889 — weather hotline for Upper Montgomery County (UMAC)
- (301)-891-6658 — weather hotline for the Spencerville Adventist Baseball League (SABL)
- The Montgomery County Parks department rainout website
All IBUA umpires should review these concussion guidelines for youth sports officials from the CDC.
Need help figuring out your hat size? Check out this conversion chart from hats-usa.com.
In addition to the resources available on our Rulebooks page, we suggest checking out these books endorsed by the IBUA Rules Interpreter:
- The Jaska/Roder Manual — an in-depth analysis of the rules of baseball including a full comparison of NFHS and OBR
- Mastering the Two-Umpire System — the best resource for two-man umpiring mechanics, published by a former MLB instructor
- The 2016 BRD (Baseball Rule Differences) — complete guide to the differences between the NFHS, NCAA, and OBR rulebooks (last updated for the 2016 season)
We suggest shopping for umpire gear from these online retailers:
IBUA 