The Oklahoma City Thunder are just one piece away from getting past the Western Conference champion San Antonio Spurs, and into the finals. The obvious goal this offseason will be to find that important missing part.

Darnell Mayberry, the senior Basketball reporter for the Oklahoman shared the team's greatest need, finding someone who can spark the team's bench. Mayberry pointed this out during a chat with fans last week, identifying what he thought to be possible trade targets.

"I think the biggest need offensively is a shooter, someone who can alleviate pressure from Westbrook and Durant as an outlet. I love the idea of an Anthony Morrow to be a specialist off the bench. Mike Miller is a solid choice as well," Mayberry said.

"Inside scoring threat is going to have to be developed in-house. Those guys are super expensive as free agents. The best you can hope for there is the Thunder getting lucky and landing someone in the draft who can develop as a low-post scorer," he continued.

The 28 year old Marrow averaged 8.4 points and shot almost 46 percent shooting, including 45 percent from 3-point range. It is widely believed he will not be in  New Orleans Pelicans next season, as he is set to become an unrestricted free agent this summer.

Miller, 34, was a valuable sharp-shooter for the Miami Heat during their last  two NBA title runs. He spent this season with the Memphis Grizzlies, averaging 7.1 points and shooting 48 percent, including a 46-percent mark from downtown. Miller has a player option for the 2014 season.

The Thunder may be more inclined to make a trade for a shooter, according to Mayberry, too. There are some low-cost free agents, but one name to keep an eye on is Orlando Magic guard Arron Afflalo.

"This free agent class is weak sauce," Mayberry said.  

"There are a couple of intriguing names, like Trevor Ariza. But he's probably going to net a deal that nets him $6 million to $8 million per. You have to remember the Thunder doesn't get in the free agency game with the bigger names," Mayberry said, referencing past deals.  

"They'll throw minimum money at role players. But overbidding in free agency has never been this team's approach. I think the more likely route is trades. That Kevin Martin TPE is dangling out there, and a guy like Arron Afflalo is just counting down the days until someone comes and rescues him from Orlando. Something to watch," he continued.  

Ariza, 28, is coming off a career year with the Washington Wizards. He averaged 14.4 points per game with a field-goal percentage of 45 percent. According to reports, Ariza has the Wizards on his"short list" of destinations this summers.

Afflalo, 28, is under contract for two more years in Orlando. But he's been mentioned in trade rumors this offseason. Afflalo averaged a career-high 18.2 points per game and shot almost 46 percent from the field this season.