Keown wrote in the Daily Mail: "A fully fit Owen is always worth consideration - goalscorers are game-changers and he has been one of the best.
"He still has something to offer a top-flight club; there's no problem in front of goal when he gets those chances.
"He is not as quick as he was but has changed his game and now comes a lot deeper to receive the ball . He is a better all-round player.
"It worries me that he has not found a club yet because his fitness would be the biggest concern. You would ideally want to bed him into a club very early and get a pre-season under his belt."