I have been pumping since 1997. When I had the Omnipod, I would try to wear it so it was covered by clothing, since I also did not want it to move while I was doing anything. I used it when I would motocross and placed it on my abdomen since my clothing covered it. It did not come off. Sometimes I would put an IV 3000 tape over it, just in case. I really liked it on my arm, but did not use it there when I was on the bike. Now that I am back to a Medtronic I just put it in my sports bra when I run, bike, or motocross. That is how I raced also. I encourage you to enjoy softball as much as possible. Every time I go out there, having had Diabetes for 50 years, I love the feeling I get from whatever sport I am doing. It is almost as if we are saying, I can do this, even though the D is in the background. Enjoy. Oh , and calibrate the activity with 15 grams of carb for every hour of intense activity, if needed. I have tried every combination imaginable, and have lowered my basal to .50 per hour for exercise. But that is totally individual, so see what your Endo says.