Devers is also 27 years old. Every 20 game stretch in his career is not going to provide equal WAR value. If Vegas set the over under on his WAR at 0.9, would you bet the under?
But more important, again he is 27. He very likely has not had his best seasons yet. I've repeatedly referred to free agency as paying players in their 30s for what they did in their 20s for another team. But that really isn't the case with Devers. He was extended at a young enough age and also with a good enough track record that he is vey, very likely going to come very close, if not flat out exceed what he has done in the past. The Sox do not have a long history with doing this kind of thing with their players and whikle Devers might have been the last choice for some to extend among him, Betts and Bogaerts, I'm glad the FO did it...