First thing is, in my opinion, what you want to accomplish in-season is maintain your gains from the previous off-season, not improve on them. It's time to pitch with what you got.
What is your rotation, 5 days?
Day before don't do any weights, rest. Some light cross training just to keep lose, don't pound it out. Maybe some tubing exercises. You can get the tubing from Oshmans (or make your own!). GoFit has some decent sets and cheap.
Probably do weights twice a week, whatever you are use to doing, but not as hard. The fact that you continue your weight training will up your poundage, but it isn't important. That is what the off season is for. It's more about honing your skills now.
If you are on a 5-day rotation, I'd also include one day of your pitching limit (what 100-120 pitches?).
So, a couple of days of weights, a few days of running, throw some pitching in there. But remember it ain't about gains now, it's about maintenance of your strength and honing your skills.
Get better as the season progresses, not more tired. Districts aren't one in the first part of the season, they are won in the last part. Make sure you have the strength and aren't burnt out at the end!
Good luck. You work at the Murphy Kwik Kar, do you live up in Murphy?