Mark Simon is a Senior Research Analyst at Sports Info Solutions, he also spent over 15 years at ESPN as a Researcher and Writer, and wrote "The Yankee Index."
https://twitter.com/MarkASimonSays
http://www.sportsinfosolutions.com/
https://www.amazon.com/Yankees-Index-Every-Number-Numbers-ebook/dp/B01FT0TII0/ref=sr_1_1?dchild=1&keywords=the+yankee+index&qid=1586016823&sr=8-1
https://www.amazon.com/Fielding-Bible-Breakthrough-Analysis-Defense/dp/0879466820/ref=sr_1_1?crid=ISSUNWJSF1UH&dchild=1&keywords=fielding+bible+5&qid=1586016845&sprefix=fielding+bible%2Caps%2C154&sr=8-1