Attorneys for former Vice President Gary Schultz and athletic director Tim Curley claim testimony by former Penn State general counsel Cynthia Baldwin would violate attorney-client privilege.
Baldwin's grand jury testimony is a key piece of evidence to support allegations that Schultz, Curley and former school President Graham Spanier tried to cover up Sandusky's abuse.
The Patriot-News of Harrisburg reports Tuesday's motion claims Schultz and Curley believed Baldwin was acting as their attorney, so prosecutors cannot call her to testify against them.
Sandusky is serving at least 30 years for abusing 10 boys, some on Penn State's campus.