ProNine USSSA Classic M Slowpitch Softballs – 12 Inch – Dozen

The ProNine Classic M is the 12 inch Classic M stamp most men’s USSSA leagues call for: a 12 inch optic yellow slowpitch softball approved for USSSA league play, with a medium seam, synthetic tacky grip cover, and a solid polyurethane center built to 40 COR and 325 lb compression. It will not dent bats. Sold by the dozen.

The Classic Stamp System, Decoded

USSSA slowpitch specifies balls by Classic stamp, and each stamp is a specific COR and compression combination. This Classic M is the 40 COR and 325 lb compression ball. If your league sheet names a different stamp, the ProNine Classic W and ProNine Classic Plus cover the other two.

League-Night Durability

The synthetic tacky grip cover keeps its surface through weeks of doubleheaders, and the poly center holds the rated compression instead of going dead in August. Bat-safe construction protects the composite barrels USSSA slowpitch runs on.

Where It Fits

All three stamps live in the USSSA slowpitch collection; non-USSSA leagues will find their ball in the wider slowpitch softballs collection.

ProNine Classic M Softball Specifications

• Size: 12 inch
• Sold by the dozen
• Seam: Medium Seam Height
• Cover: Optic Yellow Synthetic Tacky Grip
• Center: Solid Polyurethane
• 40 COR / 325 lb compression
• Will not dent bats
• USSSA Approved

Which Classic stamp does my league use?

Check your league sheet: USSSA formats assign stamps by division. The stamp printed on the ball must match what the sheet names, and that is the whole test.

Why does compression matter?

Lower compression plays softer and safer with hot bats; higher compression plays livelier. USSSA balances the two differently per stamp, which is why matching your assigned stamp matters.