Bart sketch & Matt Groening sig - maybe? 0

[Susanville]

Being in lockdown has had me drinking more but also getting back into comics. Was going through some of my long boxes and saw the below Radioactive Man #100 comic. I wasn't surprised that I had the comic but I, for some reason, just realized that there's a sketch of Bart in the UPC + a Matt Groening signature. I do not recall buying this book as a "with Matt Groening signature" and for the life of me I can't remember where/when I got it. My question is if this looks legit. I recognize that this is likely going to be your opinion but if anyone has something like this/has seen something like this I would appreciate a "it could be real" or a "no way it's real" viewpoint. Not looking to sell or anything just curious and checking to see if anyone has a perspective. Thanks in advance.