RulesMLB Umpire Manual
Procedures For Measuring Fielding Gloves
Rules 3.04, 3.05, 3.06: Official Baseball Rules 3.04, 3.05, and 3.06 describe proper glove measurements and should be enforced for all gloves used in Major League games. The key measurements are “J” and “A” lines (see Diagram Number 4 in the Official Baseball Rules). The “J” line from the top of the index finger (first…
RulesMLB
3.04 Catcher’s Mitt
The catcher may wear a leather mitt not more than thirty-eight inches in circumference, nor more than fifteen and one-half inches from top to bottom. Such limits shall include all lacing and any leather band or facing attached to the outer edge of the mitt. The space between the thumb section and the finger section of the mitt shall…
