29 August 2015; Thomas Barr of Ireland in action during the heats of the Men's 4x400m Relay event. The Ireland team of Brian Murphy, Thomas Barr, Mark English and Brian Gregan set new national record time of 3:01.26. IAAF World Athletics Championships Beijing 2015 - Day 8, National Stadium, Beijing, China. Picture credit: Stephen McCarthy / SPORTSFILE (Photo by Sportsfile/Corbis/Sportsfile via Getty Images)
