I did a study of one-knee catchers vs. two knee catchers. What I found is those with a conventional setup had a slightly better (.034 fewer WPs/PBs per 9 innings). One-knee catchers threw out a better rate of basestealers. https://t.co/IUrPJ8s8Oo https://t.co/3vUR9BwaJH

— JJ Cooper (@jjcoop36) May 17, 2021