Without doing any research, it appears the mid-market Cardinals have had the window open the longest. Before them, possibly the Braves. I've said before, if a large market team is firing on all cylinders, it's near impossible for a mid-market team to compete. Fortunately, they often shoot themselves in the foot with large, long term contracts. I think very highly of Theo, but I doubt he will survive the 6 year anchor around his neck.