Wayne Rooney has started just one of Man Utd's last six games. That was in the 4-1 win against Fenerbache in the Europa League.
On Saturday, the 31-year-old came off the bench in a frustrating game for his side against Burnley - a 0-0 draw.
Jason McAteer was on duty for Today FM's Pemier League Live coverage of the game.
Jason McAteer criticism of Wayne Rooney
Speaking afterwards, McAteer said that he thought Rooney looked both 'overweight' and 'sluggish'.
He came on as a sub. I've got to admit, I thought he looked a little bit heavier. He looked very sluggish.
Wayne Rooney, the way his body is, I think it's not conducive to sit on the bench and not play any kind of football. He won't be playing in the Under-23s. He won't be ticking over and keeping match sharp.
He'll just be getting his football through coming on as a substitute and I'd have to say that it's not really conducive to Wayne.
I actually thought he looked overweight to be honest. That sharpness had gone out of his game. Everything he did, as you'd expect, it was safe. It was a lot of passing sideways.
When Wayne Rooney is on his game and he's full of confidence, he's getting the ball out of his feet and he's hitting them from 30 yards just to try something different.
He had a great opportunity where they worked it well from a set piece. He got round the back, he ended up on the edge of the box with a free shot on goal - he squandered it over the bar and he was frustrated with himself.
I can't see Wayne Rooney really getting back into United's team. I really can't.
Asked if Rooney, right now, would even get in the Everton team, McAteer said that he had real doubts.
The former Ireland international believes that Rooney's form comes down to his physical condition. Having made his Premier League debut at 16, Rooney has more miles on the clock than an average 31-year-old footballer.
McAteer thinks that Rooney could be at the point where his body is no longer capable of giving the level of performance required by a Man Utd player.
He's on a lot of money here. Business-wise it would probably make sense to let him go.
I don't know whether Everton would be the team for him and I don't know if he would fit into Ronald Koeman's [plans].
I listened to a debate today. I listened to Andy Townsend and Andy thinks it would be a good move for Rooney to go back, with a point to prove. He'd be going back to his first love.
Wayne would give you 110% but I don't know at what level that 110% is now.
He's played a lot of football over his career. Started at 16 or 17. England, goes away all the time. Lots of European football with Manchester United.
Time catches up and your body tells you that you've had enough. I just think that Wayne's at that point.
You can listen to Rooney on Today FM's Premier League Live below.
