It is a fascinating development and I'm all for it. The question remains, though, how many innings can you get out of somebody like Hader? He went from having "one of the best relief pitcher seasons of All-Time" to "one of the top 2 or 3 relief pitchers in the 2018 season" in September. Was that because he was starting to get worn down? Or was it just a weird statistical oddity of a few rough outings? I dunno, but I suspect you can't count on more than 80 innings in a season from pitchers like Hader, Jeffress, Knebel. The other question I have is: if you had a pitcher like Scherzer, how best to utilize him? Or better yet, let's say our dreams come true and Corbin Burnes emerges as one of the Top 5 "starters" in Baseball. Is it really more valuable to have him pitch 3 innings on two days rest and max out around 160 innings? Is that physically sustainable? Or is it better to get 210 innings out of him pitching once every 5 games?