Complex sentence: He is son of Peter Grigg, who was a champion player of Western Plains Football League team Carngham-Linton, and represented Australia in Rugby Union, playing 25 tests for the Wallabies during the 80's.
Split into simpler sentences: He is son of Peter Grigg, champion player of Western Plains Football League team, Carngham-Linton. Peter also represented Australia in Rugby Union, playing 25 tests for the Wallabies during the 80's.