Found this from the Philadelphia Inquirer from September 2016. Interesting in that it has a picture of Mitch with the Phillies and comments from Tanner on how he was able to get his brother to come to ISU:
http://www.philly.com/philly/blogs/sports/phillies/A-former-Phillies-1st-round-pick-is-now-playing-college-football-Mitch-Gueller.html
PBP
http://www.philly.com/philly/blogs/sports/phillies/A-former-Phillies-1st-round-pick-is-now-playing-college-football-Mitch-Gueller.html
PBP