May have been discussed previously, but, I think #15 has been reslabbed into an SGC case as it looks dead on to the one Keith Olbermann (politics aside, that man has some nice cards) takes around to clubhouses and shares with players and coaches.
Here's the image that made me look.
https://pbs.twimg.com/media/A2pQBOHCMAAeRde.jpg
Very hard to see, but, side trims line up the same and you can compare some of the white spots are identical on the top right and left side.