Two horses by the same stallion have provided jockey Glen Boss and trainer Danny O'Brien with a winning double at Sandown.

The first win for Boss and O'Brien on Saturday came with Zahspeed who made it three-straight victories in the Ladbrokes Live Play Handicap (1800m).

Boss maintained an unbeaten record on the gelding from three rides.

"He was coming back in distance today and going up in weight, which is hard to do, but he's in a good space," Boss said.

Two races later it was another son of Speed `n' Power, Bullpit, who held off Beau Rada to score a short-head victory over 1000m.

Both Zahspeed and Bullpit are raced by Steve Pitts.

"He couldn't be here today because of some family commitments, but he'll be very happy," O'Brien's racing manager Matt Harrington said.