Right up until the point you said "baseball." In the title.
It's actually more interesting than you might think. The Houston Astro's have been a poor performing team up until very recently. They hired a new manager that uses data driven techniques similar to those used in the book/movie Moneyball. Since they hired him, the team's performance has improved. There is talk of him having some "proprietary information" that has boosted the team's performance.
The game of baseball has evolved more rapidly in the past ten years than it has in the previous 100. It is more data driven than ever. I wouldn't be surprised if teams are building computer models of performance that they then try to optimize.