The Modern MLB Rotation Chaos Portfolio Theory is the name I've given Farhan Zaidi's management style for modern MLB rotations, which is basically, letting chaos reign, but ending up with a good starting pitching success.
I've derived the name from my finance training, cribbing from the Modern Portfolio Theory. From Corporate Finance Institute: The Modern Portfolio Theory (MPT) refers to an investment theory that allows investors to assemble an asset portfolio that maximizes expected return for a given level of risk. The theory assumes that investors are risk-averse; for a given level of expected return, investors will always prefer the less risky portfolio."
The idea behind this theory is that one can create a portfolio of assets that are high risk, but with sufficiently independent industries and market factors, the overall risk of the portfolio is much lower, because, under this theory, one industry going down is just as likely as another going up, and thus the risks cancel each other out, reducing the risk of the overall portfolio.
The idea for the Modern MLB Rotation Chaos Portfolio Theory is similar in concept, in that the risk of any particular pitcher being injured or not very good may be high, but when you have enough pitchers on your team who are projected to be good (in this case, better than the NL SP average ERA of 4.56) when healthy, your 162 starts per season is covered by your portfolio of potentially injured, but usually good, starting pitchers.