Pedro Martinez just discussed the size of the 2017 ball compared to when he pitched. He said that when he pitched, he was able to get his index and middle finger between the two seams, with some space so he could throw the sinker properly. He showed with today’s ball that there is no gap, indicating to Pedro that the ball is tighter.

It’s a good demonstration, except that Martinez is notably heavier than when he pitched, especially when he was younger and still great. Believe it or not, if you gain weight, your fingers get fatter, too. So I don’t buy this remarks.