reprised this role with Parker Kligerman in the 2016 Homestead race, and again with Jarrett in 2017, 2018, and 2019. In August 2017, Diffey served as the lead announcer for NASCAR on NBCs primary coverage of the renamed Monster Energy Cup Series for two races (Watkins Glen and Michigan), filling in for regular announcer Rick Allen who was working in London with NBC's coverage of the 2017 IAAF World Championships. Global Rallycross Diffey served as lead announcer for several events of NBCSN's coverage of Red Bull Global Rallycross beginning with the opening event from Fort Lauderdale in the 2015 season. He continued to cover the series for the network until the series folded, doing play-by-play for the final round of the 2017 season from the Port of Los Angeles on 14 October. Dakar Rally Diffey serves as the US announcer for the daily world feed highlight broadcast of the Dakar Rally on NBCSN. IMSA Diffey returned to sports car racing in 2019 as the lead announcer for NBC Sports' coverage of IMSA's WeatherTech SportsCar Championship, beginning with the 2019 24 Hours of Daytona. Motorcycles Diffey began calling the AMA Supercross Championship in 2020, working play-by-play for NBC for the series along with Ralph Sheheen. Diffey took over the lead commentating role replacing Sheheen starting the 2021 season with Ricky Carmichael, Daniel Blair, and Will Christien. He also served as a studio host for the network's MotoGP and Moto2 coverage. Other sports Diffey has worked on NBC's coverage of the Olympic Games, covering luge, skeleton, and bobsled at the 2014 Winter Games in Sochi. NBC executive Sam Flood had expressed interest in having him serve as an announcer outside of motorsports while negotiating his contract with the network, and he prepared Diffey for the Olympics by having him host the Penn Relays and the Luge World Cup. Diffey remarked of serving in the Olympics: "Never in my wildest dreams did I imagine this is where my career would take me. Just working for NBC, that alone made my life. Now going to the Olympics for NBC? I just pinch myself as if to wonder is this really happening?" He returned to the Olympics to cover rowing at the 2016 Summer Olympics in Rio de Janeiro, and also called the same events he had in Sochi at the 2018 Winter Games in Pyongchang. Beyond the Olympics, Diffey has covered rugby, anchoring studio