Getty UPDATE

5:52 AM PT -- 9/24 -- James Laurinaitis -- the former NFL and Ohio State football star -- says he's heartbroken over his father's death ... writing in an emotional post Wednesday night, "I'm absolutely crushed."

UPDATE

"I hate that I wasn’t able to say goodbye," Laurinaitis said ... "I miss you already."

UPDATE

James -- a 2nd-round pick in the 2009 NFL Draft -- was close to his wrestling legend dad ... and often spoke about how Road Warrior Animal helped mold him into a special football player.

UPDATE

Laurinaitis shared pictures of the two together in his post ... and added, "I don’t have the right words to say."

UPDATE

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