Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The first world record in the 4 x 100 metres relay for men (athletics) was recognized by the International Amateur Athletics Federation, now known as the International Association of Athletics Federations, in 1912. To June 21, 2009, the IAAF has ratified 35 world records in the event. The following table shows the world record progression in the men's 4 x 100 metre relay, as ratified by the IAAF. "y" denotes time for 4 x 110 yards (402.34 m), ratified as a record for this event.