Spanier faces obstruction of justice, perjury, endangering the welfare of children and other counts.
Spanier's attorneys filed a motion for dismissal Monday, saying prosecutors improperly relied on testimony of former university counsel Cynthia Baldwin in making their case against him.
They contend that Spanier thought Baldwin was his lawyer when he testified before the Sandusky grand jury, and her testimony can't be used against Spanier.
Spanier's attorneys filed a separate motion in Dauphin County Court on Monday seeking a delay in the Dec. 13 preliminary hearing.
Sandusky is serving a 30- to 60-year prison sentence for abusing 10 boys. He maintains his innocence.