Grenville represented Victoria in a victorious Teal Cup side in 1977, and was rewarded with All Australian selection at centre-half-forward with such players as Roger Merrett, Doug Hawkins, Stevie Wright, Mark Bos, Glen Hawker, Justin Maddern, Neale Daniher, just to name a few.
Dietrich counts his time at Richmond as a great learning experience, but regrets not playing more games for the club due to torn ankle ligaments.
Here he was spotted by former North Adelaide player David Cearns, who was in town to watch his brother-in-law, Mildura assistant coach Neville Caldow.
Cearns gave Dietrich's name to North Adelaide, and one or two years later he was visited by a delegation from the club who convinced him to sign with the Roosters in 1982.
Dietrich became known for his quick leads and high marking ability, despite his less than athletic physique (the joke in Adelaide at the time was that his training regime consisted of one or two laps around Prospect Oval, with the rest of the night spent sitting at the club's bar working his elbow).
Despite his differences with Nunan, Dietrich still holds his coaching in high regard and has stated his preferred option was to stay at North Adelaide.
Before his knee injury, Dietrich's form saw him play two State of Origin games for South Australia in 1986, kicking seven goals.