The sign for "softball" is based on the generic sign
for BALL.
SOFTBALL / BALL:




Notes:
The specific meaning of this sign relies on context. For example,
suppose I ask you if you are going to the ________ tournament this Saturday?
Which concept would fit? Obviously there is no such thing as a "ball
tournament" and you would understand that I was talking about a softball
tournament. If there is any doubt if you are signing softball, you can
just do the sign "baseball" and then follow it up with the "softball" sign to
show that you are talking about the version of baseball that uses the larger
ball.
You can learn American
Sign
Language (ASL) online at American Sign Language University ™
ASL resources
by Lifeprint.com © Dr. William Vicars