Here Is a Powered-Up Addison Russell
My hunch is that it’s easier for pitchers to make adjustments on the fly than hitters. In part this is because pitchers are simply more in control — they can aim for different areas, while hitters simply have to respond. Pitchers also get more and longer breaks between appearances, and sometimes a pitch can just click. Everybody everywhere is always tweaking something, and I’m no authority, but I’d guess that hitters make their biggest changes over offseasons. That’s when they have the best opportunity to identify a flaw and get to overwriting the old muscle memory.
Yet you do see midseason adjustments. Some players are just better at adjusting than others. Some players are more aware of themselves than others. Some adjustments stick, and some adjustments fade away. Muscle memory is a fickle thing. I can tell you that Addison Russell has changed on the fly. For a while, it seemed like he’d need to either improve his contact or improve his power. His power now is trending up. He is 22 years old.

