For the second consecutive season, the Trail Blazers will enter the playoffs unsure about Brandon Roy.

But unlike last season, when Roy had right knee surgery two days before the playoffs started, the uncertainty is not about his health.

It's about his play.

Roy's up-and-down return from double knee surgery this season is currently in a downward trend, exemplified by Tuesday's 2-for-11 outing against Golden State during which he airballed an open jumper and missed several shots at the rim, all while looking stiff and immobile on defense.

In 21 games since returning from double-knee surgery in January, Roy is averaging 8.2 points, 2.2 rebounds, 2.0 assists in 20.5 minutes. He is shooting 39.6 percent from the field and 31.6 percent from three-point range. He has played as much as 28 minutes in a game, and as few as 13 minutes.

Roy insists his body feels great, and that neither of his knees are giving him trouble.

But he said he is struggling with his confidence, his rhythm and his role.

"Sometimes you have to miss, sometimes you have to play, sometimes you have to turn the ball over a little bit, just to try and push through it," Roy said Wednesday. "Coming back at the time I am coming back, I don't think coach has been fully comfortable playing me a lot of minutes, so in some ways it has been kind of hard for me. It's a different role."

It has been a nightly feeling out process for coach Nate McMillan, who says he is holding ongoing conversations with Roy to find out which plays work best for him, which players he plays well with, and what substitution patterns are best.

But that has been a difficult exercise because Roy's play has been so up and down. He has had spectacular nights, scoring 18 points in a win against Denver that included hitting a three-pointer in the final seconds to force overtime. And he has had dramatic nights, scoring 10 of his 21 points in the fourth quarter of a key win against Dallas.

But Roy also has had some unsightly nights.