Watching films from the 1950’s-1960’s, as compared to today, it appears as though swings have changed in one regard. Today, it’s very common for a hitter to release his upper hand as he follows through with his swing. Back in the day, it appears to me it was very rare. Am I dreaming?
I play a lot of softball and a lot of home run hitters do the same. Personally, I think they’d still be HR hitters if they didn’t release their grip.