How about coming off a Timeout where the Broncos were clearly going for a game winning FG you don’t send your defense out and then try to match them switching personnel within 6 seconds.
If McDermott puts the FG block team on the field they don’t NEED to rush guys off/on when the Broncos are.
Probably from the fact he is 35 and has constantly been dealing with injuries for the past 5+ years.