Oils, like neatsfoot oil, make your glove heavy and wet but even worse, oils can clog the pores in the leather this particular will eventually weaken the leather and cause it to basically just disintegrate.
If I did not know better I might think it the size 16 leather sack he consumes. https://Linkpiz.com/vn/50015/choosing-the-best-baseball-glove-guide-for-parents-players