Nice. Your curveball speed is where it needs to be too. Got a change?
Given your build I would recommend finding a baseball specific trainer and hitting the weight room. If that is not possible find a weight trainer who can show you the right way to do front squats and deadlift. I like trap bar deadlift for beginners. I stole this from one of fearsome's posts on a different thread.
"Deadlift, squats, lunges, rotational core work, medicine ball, lateral jumping, sprints, zottman curls, tricep exercises, pushups (elbows in), pull ups, dumb bell bench press, rows, band work, a rowing machine and on it goes....
the reason for the 5 lbs and under limit on the rotator cuff work is this is what stabilizes your shoulder when throwing, it is very important whether you are doing it with light weight dumbbells or bands. These are small muscles and will not be worked correctly if you are using heavy weights. Lifting heavy for rotator cuff stuff is not going to help that shoulder complex as larger muscles will take over. There is a lot of lifting that can be done, but, when doing a cuff routine there is good reason it is 5 lbs and under."
You look like you have a mobile shoulder (good for pitching) and in my opinion you should stay away from back squats unless you can find a safety bar.
You need a bigger engine (butt and legs) and bigger brakes (rotator cuff).
Eat like it is a job.
You should be close to 90 by the end of you Junior summer.