He's already the next generation of Ryu Yoon-Kim. He has no sense of hitting even at 140 kilometers. "I'll increase it slowly." That's why he didn't score a point in his first PS
Usually, pitchers can tell by themselves how good their condition is, but they feel more objective after looking at the ball speed. When pitching feels good, but there are times when the ball speed doesn't come out well, more people believe in ball speed, which is an objective indicator.????