加藤大治郎
Grand Prix motorcycle racing retired the use of #74 after the fatal accident of Daijiro Kato in 2003, #48 after the fatal accident of Shoya Tomizawa in 2010, #58 after the accident of Marco Simoncelli at the Sepang Circuit in 2011, and #39 after the death of Luis Salom at the Circuit de Catalunya in 2016. In January 2019, #69 was retired in honour of Nicky Hayden, who died in a cycling accident in May 2017. In 2021 number 50 was retired in honour of Jason Dupasquier who was killed after an accident at the Mugello Circuit