Let everybody play lets everybody feel good about themselves. Re enter so we get more kids into the games. 10 run rule so kids wont feel bad. Now I am talking about High school here. Kids are 16 and 17 years old. Look at this scenario. I have a 7 run lead in the 5th I substitute. The other team scores 6. Getting a little close. OK now all the subs out and put in "the starters". Gee that is a real confidence booster there. The same confidence you give a position player when you DH for him.