More fundamental to a program is understanding the very small improvements in lesser important qualities may not be worth the time to test. You’re training for 10-20m sprint time, doing a lot of testing won’t change this type of training much.
I think the 30 yard is a much better test for softball athletes, as a 10 m would require a lot of specific skills in max strength and explosive power.
Very rarely does a softballer sprint 30yards at full acceleration. As mentioned above, overall fitness, reaction time and short accel (10m, and maybe 20m) should be the focus of this type of training. These abilities can, and should be, trained, but a lot of testing and specialized training would be overkill, and would be better spent improving skills.