For some reason, a UNLV fan thought it would be a good idea to use this photo to promote their game against New Mexico. He has been pretty defiant about it as you can see on his twitter feed, but you can also see that he did change the picture to a white player to make it less offensive.
The fan acted alone in making the racist photoshop. The picture posted by the UNLV Rebellion can be seen on their Instagram here.
For the record, no matter the race of the player, its still offensive to put players on leashes because their mascot is a wild dog.