He had hoped to be selected for the Commonwealth Games in Scotland last July , but a shoulder injury led to him again retiring from competitive swimming . Thorpe probably will never again swim competitively , manager says . Thorpe contracted cancer after shoulder injury , manager says . Australian swimmer retired last year after shoulder injury ; required surgery after January fall . Thorpe won two Olympic gold medals in 2000 ; two more in 2004 .
Thorpe probably will never again swim competitively , manager says . Thorpe contracted cancer after shoulder injury , manager says . Australian swimmer retired last year after shoulder injury ; required surgery after January fall . Thorpe won two Olympic gold medals in 2000 ; two more in 2004 .