Without support of a 4 page white paper, as a broad statement, it is more accurate than saying, QBs tend to get injured when they don't have contact.
Perhaps a less literal reading of the sentence would be: WHEN QBs get injured, its usually when they have contact. OR, injuries to QBs tend to occur when they engage contact, as opposed to standing still and throwing, or by incidental contact of NFL thick arms spraining their boney ankles.
What "that" are you talking about?
If it's multiple "that's", my first few words were "I don't want to write a four page white paper"
But trust me, my brain can organize and process facts much better than someone's written algorithm and is much more objective than a lazy media link. If you can't keep up, that's your problem.