Collison announced Thursday that he is retiring from professional basketball, Royce Young of ESPN.com reports.

EDGE Analysis

Collison just wrapped up his 14th NBA season, all of which came with the Seattle/Oklahoma City franchise, but he became nothing more than a veteran presence for the team over his last two seasons, appearing in just 35 total games. Collison finishes his NBA career having played the third most games in franchise history and accumulated 4,701 rebounds, which is the fourth most Seattle/Oklahoma City history.

Collison played just under seven minutes in his only appearance this preseason.

EDGE Analysis

Collison saw significant decreases across the board, averaging just 6.4 minutes over 20 games a season ago. The departure of last season's backup center Enes Kanter leaves that role open, however the Thunder signed third-year center Dakari Johnson to a two-year, guaranteed deal this offseason. This, paired with Collison's sharp decrease in playing time over the past two seasons, make it unlikely for Collison to see a significant increased role this season.

Collison signed a one-year deal Friday with the Thunder, Shams Charania of The Vertical reports.

EDGE Analysis

Collison has spent his entire 15-year career with the Thunder franchise, and it appears the 2017-18 season will be his last. It's assumed that his contract is for the veteran minimum, as Collison's role on the court has diminished over the past couple of seasons, but the Thunder no doubt see the power forward as an important veteran presence on the team.

Collison (coach's decision) didn't see the floor in a 126-121 loss to the Trail Blazers on Wednesday.

EDGE Analysis

Collison hasn't played in any of the Thunder's games since Feb. 11, and has made all of 14 appearances on the season while averaging a career-low 5.8 minutes per game. It's looking like it could be the end of the line for the 36-year-old, who will become a free agent this summer.

Collison played 11 minutes in Friday's 114-102 win over the Grizzlies, recording two points (2-4 FT), three rebounds and one assist.

EDGE Analysis

Collison saw some surprising run in a game that wasn't decided until the fourth quarter, with the 11 minutes marking his second most of the season. The Thunder have a void in the rotation for a 10th man with Enes Kanter (forearm) likely out for a month or longer, and Collison could end up settling into that role after Kyle Singler flopped when given the first crack at those duties.

Collison (coach's decision) didn't play in Monday's 109-94 win over the Bulls.

EDGE Analysis

Collison has only made one appearance in the Thunder's past 11 games and doesn't look on track to reenter coach Billy Donovan's rotation in the near future. The 36-year-old's main role will come as a mentor for the team's younger players in what could be the final season of his NBA career.

Collison logged eight minutes in Tuesday's 114-95 loss to the Trail Blazers, providing no points, three rebounds and one assist.

EDGE Analysis

It was Collison's first appearance since Nov. 16, as the Thunder's blowout loss allowed some of the team's deep bench options to get some rare run. At this stage in his career, Collison is little more than a positive presence in the locker room, with coach Billy Donovan not depending on him for much on-court contributions.

Collison (coach's decision) didn't play in Monday's 97-85 win over the Thunder.

EDGE Analysis

Collison remains an important veteran voice in the locker room, but he's not going to be a member of coach Billy Donovan's rotation in most games. He's appeared in just one of the Thunder's first seven contests.

Collison played one minute and didn't accrue any statistics in Wednesday's 95-91 win over the Spurs in Game 5 of the series.

EDGE Analysis

Aside from a 19-minute appearance in Game 1 when the Thunder were blown out, Collison has logged only five combined minutes over the other four games of the series. He'll likely struggle to see the court in competitive contests unless frontcourt starters Steven Adams and Serge Ibaka succumb to foul trouble.

Collison (chest) will be available for Game 2 against Dallas on Monday, Anthony Slater of The Oklahoman reports.

EDGE Analysis

Collison saw spattered minutes throughout the regular season and it's possible that he'll even struggle to leave the bench throughout the playoffs. Although, the veteran was able to play eight minutes off the bench Monday during the 108-70 blowout.