White, 26, played 105 games and kicked 54 goals in an eight-year career with the Tigers.
His efforts in the 2013 season were acknowledged at the Jack Dyer Medal night this week, when he received the Club’s most improved player award.
“On behalf of the Club, I would like to thank Matty for his valuable contributions, and the fine service he has provided us with over the past eight years,” said Richmond’s General Manager of Football, Dan Richardson.
“He’s been an extremely popular figure around the Club, and we’re sorry to see him go, but that is the nature of free agency and we understand that Port Adelaide has presented with him a great opportunity.”
“We wish him all the best for the future and he will always be welcomed at Richmond.”
