came up to lap him on lap 23 Walker suddenly found form, Fittipald taking a couple of laps to get by, and when he did, Walker clung on, his 72, as tail out as Peterson would drive the car the following year, and extraordinarily under pressure and possibly hitting oil from Ickx Ferrari, Fittipaldi, slipped and Walker passed, and the extraordinary cameo continued, until an increasingly annoyed and fist waving Fittipaldi, was allowed thru by Walker, whose race effectively ended the following lap when he came up to lap backmarker Nicki Lauda, the Austrian in an uncompetitive March 722, the Austrian, restoring order by not giving way to the equally lowly rated Australian. Lotus blamed Walker's allegedly inadequate driving technique, poor fitness and lack of mechanical sensitivity; while Walker claimed Lotus gave him inferior equipment and gave far more attention to Fittipaldi's needs than his. He was not retained for the 1973 season, and was replaced by Ronnie Peterson. David Walker remains the only driver not to score a single Formula One Championship point in the same season his teammate won the drivers' title. For 1973, Walker drifted into Formula Two but was unfortunate to be badly injured in two road accidents that year. He retired from motor racing at the end of 1975, saying the effect of crash injuries made him not the same driver, and he was trying too hard, after a few impressive outings in the UK Shellsport F5000 series, taking a front row grid position at Oulton park and now lives in Queensland running a boat charter business. Racing results Career summary Complete Formula One World Championship results (key) Non-Championship Formula One results (key) (Races in bold indicate pole position) (Races in italics indicate fastest lap) * Walker was entered in the 1971 Jochen Rindt Gedächtnisrennen in a Lotus 56B, but the car suffered an engine fire during practice, so Walker took over Tony Trimmer's Lotus 72 for the race. References Sources Lotus 72 - Formula One Icon by Michael Oliver (Coterie Press, 2004) Forix Grandprix.com External links F1 Rejects biography [Archived link] Profile at Driver DataBase Profile at Racing Reference USA 1941 births Sportsmen from New South Wales Australian Formula One drivers Team Lotus Formula One drivers British Formula Three Championship drivers Atlantic Championship drivers Australian Formula 2 drivers Racing drivers from Sydney Tasman Series drivers Living people