Midfielder Dom Cassisi will captain Port Adelaide for a fourth straight season, with Hamish Hartlett the only newcomer in the AFL club’s five-man leadership group.

Travis Boak has been promoted to vice-captain, while 21-year-old defender Jackson Trengove, who shared the club’s best and fairest award with Boak last year, remains part of the group.

The other member is key forward Jay Schulz.

Coach Matthew Primus said Cassisi, 29, remained a standout choice as skipper.

“Dom keeps developing his leadership skills every year and he really stood tall both on and off the field last season in what was a very challenging year,” Primus said.

“He’s got the ultimate respect of the playing group, the coaches and everyone involved at our club so it was a unanimous decision.

“We’re looking forward to supporting him as he continues to grow and develop in the role.”

Cassisi said it was good to have some youngsters supporting him, with Hartlett and Trengove both 21.

“I’m extremely excited about the young leadership group I’m going to have around me,” he said.

“I know we’re going to be able to drive the culture and behaviours that we need and expect at the club.”