National Football League
The National Football League or NFL is the premier league of American-style football in the world. Many NFL players appeared in the majors, minors or Negro Leagues and others were chosen in the amateur draft but opted for football instead; yet others coached college baseball after their NFL careers. See Category:NFL Players
- Scott Boeck: "Major League Baseball players who were drafted by an NFL team", USA Today, April 23, 2020. 
- Matt Kelly: "Which MLB players played in NFL or NBA? Few athletes made it to professional ranks in multiple sports", mlb.com, December 9, 2021. 
- Brian McKenna: "Professional Baseball and Football: A Close Relationship", in The National Pastime - A Review of Baseball History, Society for American Baseball Research, Cleveland, OH, number 26 (May, 2006), pp. 26-32.