Why do you say crazy? There were obviously several teams involved. That drives up the bidding. I am sure the Cubs thought they could get him for less but didn't want to take the chance.
Wonder if this will be the domino that starts the other free agent pitchers signing? It can't be too much longer for that.
he's almost 32, has only pitched more than 140 innings once in the last 4 years, and his FIP has been around 3.50 over that same span. He's at best a #3 pitcher right now, and is likely in decline. Making a 6 year commitment at north of $20 million a season for him seems like an over-pay, and one that will hamstring them if he continues to have health issues.