Duffen insists Brown’s job is safe despite Hull’s poor start to the season.
“There is no speculation at the football club about the manager’s position,” Duffen told The Times.
“That’s just mischief making in the media if there is. We are certainly not aware of it.
“In football you are always going to find a vociferous minority who will be discontented and I also think second-season syndrome articulates a little bit about fans and a club who got into the Premier League for the first time in 104 years.
“In the second season maybe they have set themselves unrealistic expectations. At the moment we are seven games into a new campaign.
“We are right in the mix, only a few points separates us from the middle of the league and I am really pleased with the signs I see developing in the squad.
“As you could see, we certainly don’t lack spirit or heart. Everyone is playing for each other and they are certainly playing for the manager.”
