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Adobe PDF file 2017 HMBL Rules *- The Harford Menís Baseball League (HMBL) will play under Major League Baseballís Official Baseball Rules (OBR) along with the local modifications listed below. The Official Baseball Rules (OBR) can be found at: http://mlb.mlb.com/NASApp/mlb/mlb/official_info/official_rules/foreword.jsp UMPIRES WILL INTERPRET AND ENFORCE ALL RULES. DECISION OF UMPIRING IS FINAL.

Adobe PDF file Official MLB Rules *- These are the official rules of the MLB as of 2017. They are supplemented by the rules of the HMBL.

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