A referee may stop the match when they or official ring physician decides that a wrestler cannot safely continue the match. This may be decided if the wrestler cannot continue the match due to <answer>an injury</answer>. At the Great American Bash in 2008, Chris Jericho was declared the winner of a match against Shawn Michaels when Michaels could not defend himself due to excessive blood loss and impaired vision. At NXT TakeOver: Rival in 2015, the referee stopped the match when Sami Zayn could not defend himself due to <answer>an injury</answer> sustained against Kevin Owens for the NXT Championship.
What is one reason that a wrestler may not be able to continue?
an injury