On 22 March 1958 Kessler became class winner at "12 hour Florida International Grand Prix of Endurance for the AMOCO Trophy" (12 h Sebring), driving a Ferrari 250 GT LWB (#0773GT).
O 22 de marzo de 1958 Kessler gañou na súa clase nas 12 Hours Florida International Grand Prix of Endurance for the AMOCO Trophy (12 Horas de Sebring), pilotando un Ferrari 250 GT LWB (# 0773GT).