The article doesn't say that Elliots movie ending injury happened after the OK corral. It says verbatim, and I quote "the movie ends his story a little too soon by showing how he gets severely injured after an ambush."

Did you even read the article?

The article above does not say his crippling injury came from the OK corral. It says verbatim - "the movie ends his story a little too soon by showing how he gets severely injured after an ambush." Maybe read it thoroughly next time instead of skimming it.