That's the book on Lamar. He lives off teams that pressure him and then makes a guy miss in the pocket and he can take off because there's no one there anymore. You worry less about pressuring him and make sure you keep him contained then let your secondary work. He's not good at throwing the football. When he starts racking up passing yards is when teams don't keep contain, he kills them running then they start creeping up and he gets yards of separation, if not totally broken coverage, to make throws.
All teams have to do is realize that you play him differently than other QBs. Stop trying to get pressure at all costs. It's more important to ensure the running lanes remain closed.