Ditto, who is listed as a fourth-team outside linebacker on the pre-Akron depth chart, has not practiced with the team all week, sources say.
He is, however, still enrolled at the university.
Ditto was a four-star tight end prospect out of Gateway High in Monroeville, Pa., when he committed to the Nittany Lions in June of 2006.
After enrolling at PSU in the winter of 2007, he sustained a shoulder injury the following spring and redshirted that season.
He played tight end and wideout as a redshirt freshman in 2008 but did not make any catches.
Ditto moved to linebacker in the spring of this year.