We found Brian Yauger!
Several weeks ago, we ran a contest to find Brian Yauger in a Where's Waldo picture. The prize offered was an 8-pack of La Croix; a drink that seems to be omnipresent lately. We did have a budtender send us an answer to the riddle, but alas, the answer was incorrect. HOWEVER- we will be shipping the contestant the Seltzer anyways since we respect the effort :)
The solution to the puzzle is column S between rows 8 & 9. Follow the red arrow.