His transfer release also excludes upcoming Atlantic Coast Conference opponents as well as upcoming nonconference opponents such as West Virginia and Temple.
Max Garcia's and Mario Rowson's releases contain similar provisions.
Vanderbilt is coached by former Maryland offensive coordinator James Franklin.
O'Brien and Franklin have remained close. Maryland is concerned that Franklin and O'Brien may have been in contact as the player pondered his football future. I don't know if there was any contact or not.
O'Brien likes Franklin's pro-style offense -- a variation of the "West Coast offense."
Maryland coach Randy Edsall and the program's spokesman declined comment about the specifics of the releases. Maryland is disappointed at losing O'Brien, but it doesn't want to get into a war of words with the player. It wants to move forward with quarterback C.J. Brown.
"It's time to start the C.J. Brown era here at Maryland," Edsall said in an interview.
After Franklin -- Maryland's former "head coach in waiting" -- left for Nashville, he took with him assistants John Donovan and Charles Bankins, and strength and conditioning director Dwight Galt. Those assistants had all worked with Franklin under former Maryland coach Ralph Friedgen.