Paralympics: Peacock breaks 100m record Jonnie Peacock hopes he can continue to "push the boundaries" in amputee sprinting after breaking the 100m world record on Saturday night. The 19-year-old finished in 10.85sec at the US Paralympic Trials, 0.06sec faster than the T44 record set in 2007 by American Marlon Shirley. Single-leg amputee Peacock led home a strong field that included world champion Jerome Singleton, the 2004 Paralympic champion Shirley and last year's Parapan American Games gold medal winner Jarryd Wallace. Peacock's time, which bettered his previous best by 0.39sec, was also faster than the 10.91 mark set by South African "Blade Runner" Oscar Pistorius five years ago. When I started running I hated saying my PB was 12 something. It was better when it was 11 something; now I'm delighted it's 10 something," Peacock said.