This is my first post for Mack's Mets. A little about who I am. I grew up on Long Island NY as a died hard Mets fan. I joined the Air Force out of High School. I am now a displaced Mets fan. I live near Dallas Texas where I am a High School math and history teacher. I mostly teach math, Algebra II and Geometry. Some of my students who had me for both suggest that I never attempt to teach English. This indicates that I can't promise there wont be spelling and grammatical mistakes in my post. I will do a better job than I usually do at proof reading but still no promises. Now lets get to it.
The idea of a permanent six man rotation. In reality most teams are already using a six man rotation. It's just that one of the six is being rotated to the DL because of Tommy John surgery. Over the last five or six years there has been an average of 30 Tommy John surgeries performed on MLB pitchers per year. Starters end up under the knife more frequently than relievers. It takes 12 to 18 months to recover and generally two seasons to get back to normal. Bradley Woodrum of mlbtraderumors supplied stats that showed the better a pitcher performed the more likely he was to end up under the knife. The lower a pitcher's earned run average the more likely he is to end up under the knife. He suggest this is because better pitchers are asked to pitch more often. I think it's because better pitchers have better stuff and better stuff requires more of the arm. There's also a connection based on how hard pitchers throw. All of that means that at any given time there are about 36 starters somewhere in the process of recovering from Tommy John surgery and that they are above average starters as a whole.
Objection 2 is that pitchers will not be sharp on 5 days rest. I currently live near Arlington TX, home of the Texas Rangers. Even before Yu Darvish went under the knife he was advocating for a six man rotation. It was what he was used to and he performed well under those conditions. Japan and Korea are both using 6 man rotations. There are a lot of arm issues in Japan but not Tommy John type injuries. Most of the issues are attributed to the insane use of pitchers as amateurs. The lack of Tommy John surgeries needed suggest the 6 man rotation is working. Japan does have a 28 man roster. The manager does have to declare 3 players ineligible before each game. Pitchers in Japan and Korea don't have issues being sharp with 5 days of rest. They adjusted to that and Met pitchers can adjust to that.