Report: Bo Graham resigned from ASU due to student-athlete relationship

There has been a lot of speculation on why Arizona State running backs coach Bo Graham suddenly resigned from the program Monday, but more details are starting to emerge.

CBS Sports personality Doug Gottlieb reported Wednesday Graham's resignation is due to having a rumored relationship with a student-athlete that no longer is competing at the time.

#1 Arizona State assistant coach -Bo Graham resigned due to relationship w/former #ASU athlete (relationship began when she was a student)

— Doug Gottlieb (@GottliebShow) August 26, 2015

#2 Arizona State has set rule that prohibits any coach from having a relationship w/student, regardless of age

— Doug Gottlieb (@GottliebShow) August 26, 2015

Multiple sources have confirmed to me that Bo Graham resigned when his relationship was exposed to athletic department

— Doug Gottlieb (@GottliebShow) August 26, 2015

Rumors started to swirl Monday when former ASU quarterback Rudy Carpenter sent this tweet shortly after news of Graham's resignation broke:

Not a good idea 4 college coaches to get caught with students or student athletes. OUCH

— Rudy Carpenter (@rudygcarp12) August 25, 2015

ASU coach Todd Graham was asked about Bo's departure and Carpenter's tweet following Tuesday's practice, but he quickly dismissed it by saying Bo had accepted a job elsewhere and called it a "personal matter."

"I don't pay attention to any stuff about that," Todd Graham said about Carpenter's tweet.

ASU graduate assistant Josh Martin has assumed Bo's position as running backs coach.

We'll continue to keep you updated on this situation.