I think he looks thinner as well, definitly lost a couple of pounds since, lets say - the HC season shirtless pictures.
And there is no way a Jacket from last year would bust around the stomach, come on.
Yes, even if he gained a few pounds that wouldn't happen. But I saw the video of the players trying their 'outfits' on in Madrid and clearly the jacket they had for Roger was to small all over. Somebody messed up on their measurements.