Rubuta ci gaba don wannan sakin layi - A cikin 1952, Kavanagh ya zama Australiya na farko da ya lashe tseren babur na babur lokacin da ya lashe 350cc Ulster Grand Prix. A cikin 1956, ya ci Junior TT a Isle of Man TT tsere. Kavanagh ya shiga Formula One Grand Prix guda biyu a 1958 tare da nasa Maserati 250F, da farko a Monaco
inda ya kasa cancanta, kuma a karshe a Grand Prix na Belgium inda ya rasa tseren da ya fashe da injinsa a cikin gwaji, bayan ya cancanci 20th na 28 masu shiga.