- On This Day in Moto: May 17May 17, 2018Jeff Stanton wins at Southwick, Eric Geboers runs out of gas during the first moto of the FIM 250cc Grand Prix in Holland, and the four-stroke revolution begins with Doug Henry on a 400cc Yamaha.
- On This Day in Moto: May 16May 16, 2018Bob Hannah gets his first 250 National win, Ricky Carmichael returns to racing after injury, and Jeff Emig takes the last win of his career.
- On This Day in Moto: May 15May 15, 2018Jeremy McGrath wins his ninth AMA Supercross main event to clinch the championship as a rookie, Japan gets its first (and only) FIM 250cc Grand Prix win, and more.
- On This Day in Moto: May 14May 14, 2018Ricky Carmichael wins in his outdoor debut, Rick Johnson clinches his second AMA Supercross title, and more.
- On This Day In Moto: May 13May 13, 2018Supercross visited Pittsburgh for the first time, Gary Jones got Honda's first major motocross win, and more.
- On This Day In Moto: May 12May 12, 2018Damon Bradshaw won his hometown race at Charlotte Memorial Stadium, Gennady Moiseev went 1-1 at the 250cc Grand Prix of Poland, and more.
- On This Day in Moto: May 11May 11, 2018Ricky Carmichael wins his third straight AMA National in his rookie season, David Bailey tops the podium in the Los Angeles Coliseum, and more.
- On This Day in Moto: May 10May 10, 2018Rick Johnson clinches his first AMA Supercross title, AMA Supercross visited Kansas City for the first time, and more.
- On This Day in Moto: May 9May 9, 2018Ricky Carmichael breaks the longest losing streak of his career with a win at Glen Helen, Gary Jones wins on a bike he and his father made in Mexico, and more.
- On This Day in Moto: May 8May 8, 2018Ryan Dungey ends his first 450SX title run, V-E Day is celebrated with plenty of racing in Prague, and more.
- On This Day in Moto: May 7May 7, 2018Cooper Webb wins his second straight 250SX West Region title by one point, Yamaha sweeps Southwick, and more.
- On This Day In Moto: May 6May 6, 2018Jeff Stanton and Damon Bradshaw win at the Meadowlands, Jeremy McGrath wins his seventh AMA Supercross Championship, and more.