Smart Caloundra galloper Hazard Bay put a week of drama behind him to keep an unbeaten record at Doomben on Saturday.

Hazard Bay ($7.50) had led all the way to win his first start at the Sunshine Coast but came from well back to win the BMAG Handicap (1050m).

The gelding had been the centre of controversy after he threw his jockey Glen Colless on the way to the barriers last week and was a late scratching.

It was the second time Hazard Bay had dislodged his jockey before the start.

Hazard Bay was only allowed to start on Saturday after passing a stewards's trial and was led to the start by the clerk of the course.

Owner Neville Bell breathed a sigh of relief after Hazard Bay scored by 1-1/4 lengths to I Am Boss ($7.50).

"Hazard Bay has nearly had as much publicity as (Group One winner) Buffering this week. But it is a relief because we have always had confidence in this horse," Bell said.

Trainer Stuart Kendrick and winning jockey Brad Stewart agreed that Hazard Bay was an untapped galloper.

"I really don't know how good he is but he certainly is tough. I think he will be even better at 1200 metres or 1400 metres," Kendrick said.

Stewart said he was concerned when Hazard Bay had been unable to keep up early in the race.

"I was thinking I might have some luck in the straight and run a place. But when he got clear he really hit the line," he said.

"I really don't know how good he could be."

Earlier, jockey Chris Munce continued his good association with stayer Black Ninja when they scored a last-stride win in the Acquired Awareness Traffic Management Handicap (2200m).

Munce hadn't ridden Black Ninja since scoring by five lengths in a 2200m race at Doomben in February.

"I knew he could stay and when they ran along early I thought it would suit us," Munce said.