Here’s an interesting story about Jim Brosnan, a very good relief pitcher in the National League. In 1959 he was with the St. Louis Cardinals, and one day he was having a conversation with pitching coach Clyde King, and he was complaining about his two fast balls, the two-seamer and the four-seamer, neither of which was working for him. So King called in a catcher and instructed Brosnan to do some throwing, using both fast balls in the process. After about fifteen minutes he told Brosnan to drop the four-seamer and go with the two-seamer which was working much better for him. So Brosnan became a sinker-slider pitcher and had great success with this combination for several years with Cincinnati.
It’s possible that you’re facing a similar situation—that one of your fast balls is working better for you than the other. You need to check this out and see for yourself. It may be a timing issue. Also, did you know that just about any pitch can be turned into a nice changeup? You can experiment with a few such—after all, it’s the grip that’s key here. You just might find yourself a good one to work with.
And as far as control goes—here’s something I used to do when I was a little snip and carried well into my playing days. I would get a catcher, and we would go to a little-used playing field, and I would take the mound while he set up behind the plate. And we would play a little game we called “ball and strike”, in which he would position his mitt in various places—high, low, inside, outside, every which way but standing on his head! :lol: I would concentrate on getting the ball smack-dab into the pocket of the mitt, and I did so with all my pitches, at different speeds, such as it was because I didn’t have a fast ball to speak of—and, because I was a natural sidearmer, I would use the crossfire a lot. I can tell you, that’s just about the best way I know of to sharpen one’s control!
Above all—relax. Don’t pull your hair out by the roots over your current difficulties with some pitches—just work at it, and eventually you’ll get things squared away. 8)