Penn State officially announced the changes Tuesday night. Here are statements from head coach Bill O'Brien and assistants Ron Vanderlinden and Charlie Fisher. According to a news release both coaches resigned to pursue other career opportunities.

"I appreciate all of Ron and Charlie's hard work and thank them for their dedication and service to Penn State," said O'Brien. "I wish them well in all their future endeavors."

"I've greatly enjoyed my 13 years at Penn State and all the student-athletes I had an opportunity to work with," Vanderlinden said. "I wish Coach O'Brien and Penn State nothing but the best in the future."

"I want to thank Penn State and Coach O'Brien for the opportunity to be a part of the program the past two seasons," said Fisher. "It was a great experience and I am very proud of what we accomplished. Now I'm looking forward to the next chapter and making a positive impact on the next group of players I have the privilege of working with."

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Two Penn State assistant coaches won't be on the sidelines in Happy Valley next season according to sources around the Penn State football program.

Sources confirmed to StateCollege.com that neither linebacker coach Ron Vanderlinden or quarterback coach Charlie Fisher will return for the 2014 campaign. Fight On State first reported the news late Monday night.

As of early Tuesday morning, Penn State has yet to officially comment on early reports or officially announce the changes. Similarly, sources did not indicate the reasoning or circumstances surrounding the moves.

None of the three parties involved returned a request for comment on Monday afternoon. The team was informed of the changes on Monday.

Vanderlinden has coached at Penn State since 2001 and has long been credited with the development and growth of Penn State's self-titled "Linebacker U" program.

Fisher was hired as a member of head coach Bill O'Brien's staff and had a hand in Penn State's offense, developing quarterbacks Matt McGloin and true freshman Christian Hackenberg.

No timeline has been announced for replacing the two vacant positions although it is reasonable to assume that the moves were anticipated internally and not reactionary as the Nittany Lions upset No. 15 Wisconsin in the season finale this past weekend.

Defensive line coach Larry Johnson Sr is now the only remaining assistant coach from the Joe Paterno era.

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