It's been a year since LeSean McCoy ruined the ending to the insanely anticipated "Avengers: Endgame" movie ... and the NFL star is FINALLY apologizing for the huge mistake.
Of course, Shady infamously tweeted out "RIP my dog TONEY STARK" on April 26, 2019 -- before most people were able to check out the Marvel flick for themselves ... and instantly became Public Enemy No. 1 on social media.
BTW -- for those who haven't seen the flick, Iron Man dies at the end of "Avengers: Endgame." You've had a year to watch it. It's not our problem anymore.