So, he gathered 30 years of sports betting data for games in Main League Baseball, the National Basketball Association, the National Football League, and the National Hockey League. https://zt.com.au/ext/aHR0cHM6Ly9maW5kYWJyaWRnZS5jb20vJUVCJUE4JUI5JUVEJThBJTgwJUVBJUIyJTgwJUVDJUE2JTlEJUVDJTk3JTg1JUVDJUIyJUI0LSVFQyU4QSU4OCVFQyU5NiVCNCVFQiVBNyVBOCVFQyU5NyU5MCVFQyU4NCU5Qy0lRUIlQUYlQkYlRUElQjMlQTAtJUVCJUE3JUExJUVBJUIyJUE4JUVCJTlEJUJDLw/itblmid/666/