John Chavis may have left LSU for Texas A&M to become the Aggies’ new defensive coordinator, but he will be expected to leave behind a sizable check because of a buyout clause in his contract.

LSU Athletic Director Joe Alleva said Thursday that the school’s legal counsel has advised him that Chavis owes LSU $400,000. Chavis’ contract ran through Dec. 31, 2015.

Chavis signed a three-year contract in 2012 running through December 2014, but he was given a one-year extension in January 2013, via a memorandum of agreement he signed with the school and given to The Advocate.

His original contract called for a $400,000 buyout in the second-to-last year of the deal. The buyout dropped to $0 in the last year of the contract, which was originally 2014 but moved to 2015 with the one-year extension.

“We will expect Coach Chavis to comply,” Alleva said.

Chavis flew to College Station, Texas, on Thursday. Texas A&M will reportedly pay him $1.5 million in his first year.

Alleva confirmed that LSU offered Chavis a three-year, $4 million deal (an average of $1.33 million per year) which Chavis declined to sign.

Alleva said the offer from LSU was “firm and fair.”

Alleva rebutted reports that Chavis left because of a clause in his contract which said LSU was obligated only to pay him six months salary should head coach Les Miles leave for any reason.

He said he spoke to Chavis before he left for A&M and there was no talk of the “Miles clause.”

“He just said it was time for him to move on,” Alleva said.

Chavis spent six seasons as defensive coordinator at LSU, arriving in Baton Rouge in 2009 less than a year after Alleva became athletic director.

Alleva said he has every confidence LSU will be able to attract a top-level defensive coordinator.

Follow Scott Rabalais on Twitter: @RabalaisAdv.