The double-amputee sprinter must run the 400 metres in 45.30 seconds or faster once more before June 30 to earn a trip to the London Games. Pistorius has posted an Olympic 'A' qualifying time twice.
Pistorius is a four-time Paralympic gold medallist racing on carbon-fiber blades. He's trying to make history by reaching the Olympics.
Pistorius was fifth in the 400 at last year's Adidas Grand Prix. This year's meet is June 9 at Randall's Island, east of Upper Manhattan.
He also plans to run at two meets in Europe and at the Prefontaine Classic on June 2 in Eugene, Ore., as he tries to make the qualifying time.