Orb was so far behind a wall of horses at the Kentucky Derby that even his jockey wasn’t sure he could master the muddy track and make a run for the roses.

“I was really far back,” Joel Rosario said. “I said hopefully he can go faster than that. I was saying maybe I was too far back, but it was so easy.”

The bay colt made it look that way Saturday, splashing through the slop to win the Derby by 2 1-2 lengths and giving Hall of Fame trainer Shug McGaughey his first victory in the 3-year-old classic.

Long shot Golden Soul was second with Revolutionary third while Normandy Invasion faded to fourth.

Orb, the 5-1 favorite, broke from the No. 16 post and bided his time near the back of the pack early while Palace Malice set a blistering pace in the muck.