I love every single one of these boys, and the man with jauntily cocked hat standing in the back row, I presume their coach, too. Great faces, and postures, and sporting quite the variety of uniforms (love those overalls!) and array of logos too. The BS I know is for Ballston Spa, just a bit north of Albany, NY. With the framing of the photo I think perfectly suiting the subjects--the tops of the caps of the tallest boys in the back row just barely cut off, and a partial glimpse of a pile of bases (I think), glove and catcher's mitt in the center near foreground. 

5 3/8" x 3 3/16", early 20th century, good condition, with minor bumps to the corners and one small crease to upper right corner border.