Ed Orgeron is calling things off with his wife, Kelly ... the LSU head coach filed for divorce a little more than a month after he led the Tigers to a National Championship.
The 58-year-old filed the court docs in Louisiana back on Feb. 26, according to The Advocate ... and in them, he says he and Kelly officially split on Feb. 24.
The two had reportedly met on a blind date in 1996 ... and were married shortly after on Feb. 19, 1997, the docs say.
Orgeron and Kelly raised three sons together .