James Mosher Baseball League is a youth baseball league established by James Mosher Associates, Incorporated. The league serves boys and girls ages 4 through 18 throughout the Baltimore, MD metropolitan area.
 

The league is divided into the following age groups:
 

Tee-ball division (ages 4-5)

Instructional division (ages 6-8)

9-12 division (ages 9-12)

RBI division (ages 13-15 and 16-18 )