I visualized those men playing in those old ballparks. From 1967 through 1969, Perez hit however.289 and averaged 27 home runs and 105 RBIs per fall.
You may see this in older gloves that have treated with oils and also falling above the rest. https://Muhammadcenter.com/ultimate-guide-to-finding-the-best-youth-baseball-gloves-on-the-market-3/