Flying Column II's Generous Rosi, an English-bred son of Generous, led every step of the way en route to a three-length victory in the $50,000 Buckpasser Handicap Saturday at Arlington Park. Robby Albarado rode the Niall O'Callaghan-trained 7-year-old. Generous Rosi covered the 1 1/8 miles over a fast track in 1:49.53.The win was the first in three starts this year for Generous Rosi, who earned $30,000 for the score to boost his bankroll to $464,392. He paid $5, $3 and $2.40. He won the won the Turfway Park Fall Championship (gr. III) last year and later ran second to Aptitude in the Jockey Club Gold Cup (gr. I) at Belmont Park.McMahon, who captured the $100,000 Sportsman's Park Breeders' Cup Handicap in March and the $100,000 Precisionist Handicap at Prairie Meadows in July, chased the winner throughout to finish second. He returned $2.80 and $2.20.On Your Mark made a belated rally to run third and paid $2.60.Saquache and Apalachee Special completed the order of finish.