Baseball and Viewpoint Discrimination?

As students are aware of my baseball allegiances, I am getting many questions and comments from students about the Cubs current position in the baseball playoffs. One student shared this story from last week--a professor at the University of Illinois moved the mid-term exam for a student because the student had obtained tickets to last week's National League Wild Card game in Pittsburgh.
This is the student's plea.










And this is the professor's response










Viewpoint discrimination? What about the Cardinals fans who no doubt are in the class?