First Baseman's glove

[Dakota]

As to why ASA cares and NFHS doesn't - beats me.

Baseball & Softball Glove Buyer's Guide
The main difference between gloves and mitts is that gloves have fingers and mitts don't. Mitts tend to do a better job of controlling balls that don't hit in the pocket and can aid scooping ground balls and short hops.

Most first base mitts are designed for baseball use and are 12 to 12 1/2 inches. First base mitts have a thin but stiff pad that runs around the circumference of the mitt with little or no padding in the palm or finger area. Larger baseball first base mitts can be effectively used by softball players. Some manufactures will make softball specific first base mitts. These are usually 13 inches or larger and are not very common. Most softball first basemen use a 13 to 14 inch softball outfield glove at first base.

Baseball catcher's mitts are usually have a very thick pad around the circumference of the mitt and thick padding in the palm and finger area and a small pocket. Softball catcher's mitts are similar to baseball catcher's mitts except they have less padding and a much larger pocket.

Did you mess up? Not unless the mitt was too big!