Oklahoma City, OK (SportsNetwork.com) - Oklahoma City forward Nick Collison is the longest-tenured member of the Thunder and will stay that way for the foreseeable future.

Collison inked a multi-year contract extension on Tuesday, terms of which were not disclosed. He has been with the franchise since the Seattle SuperSonics made him the 12th overall pick of the 2003 NBA Draft.

"We are excited that Nick Collison will continue his tenure with the Thunder," said Thunder general manager Sam Presti in a statement. "Since our arrival (from Seattle) in 2008, Nick has helped us establish the standards on and off the floor that we work by on a day-to-day basis. He has accepted various roles, demonstrated professionalism in all aspects of his craft, and shown a commitment to an organizational philosophy that is rare in sports today. Nick is the type of player that will always be valued in Oklahoma City, and we are thrilled he will continue to be a foundational member of the Thunder moving forward."

Collison owns career averages of 6.4 points and 5.5 rebounds in 791 NBA games. He is averaging 3.8 points and 3.4 rebounds this season.

"I'm excited to continue my career with the Thunder, playing here in Oklahoma City," said Collison. "I feel fortunate to be a part of a great organization and to play with a great group of teammates. Playing in Oklahoma City is unique, it's a rare combination of a lot of things; great people in the organization starting with ownership, the most loyal fans, the opportunity to win at a high level and a true community impact. It's been a great professional experience for me since the day I arrived. I'm proud of what we have built together and am grateful to be able to stay with the club and continue our work together."

The 6-foot-10 Kansas product ranks among the franchise's all-time career leaders in rebounds (3rd, 4,370 career rebounds), blocks (6th, 439 career blocks), field goal percentage (2nd, .537) and games played (2nd, 791 career games).