The Central Charlestown junior made his debut for the Knights in Round 12 in the 2004 season and went on to play 101 games. In 2010, he was honoured to captain the Knights when Kurt Gidley was on State of Origin duties.
The 28-year old is naturally disappointed to be retiring from the NRL.
“I have been at the Club a long time now, I came here as a 15-year old, and it is just disappointing that injuries have forced me to pull the pin earlier than I planned,” Tolar said.
“I take with me a lot of great memories and now look forward to the next chapter of my life.”
Knights CEO Matthew Gidley praised the one-team player for his service to the Club.
“It is unfortunate that injury has brought about Dan’s early retirement,” Gidley said.
“He is a popular member of the team; he will be missed as a great team man and mentor to the younger players coming through.
“Dan should be proud of what he has achieved. He was a committed and professional home-grown talent and you knew he wouldn’t let you down.
“We thank Dan for his contribution to the Knights and we certainly wish him and his family all the best in whatever he chooses to do next.”