You might try reading the article. The problem is that baseball games don't sell like other sports games, so even marketing them has a limited effect. It's not like The Show is exactly a mega seller itself.
2K made a mistake by investing too much money in their deal with MLB, for a sport that just doesn't translate nearly as well to videogames as football, basketball, or even hockey.
The fact is, The Show and MLB 2K9 sold about the same. So the increase cost to 2K means that they need to cut corners to make money. This doesn't bode well for 2K10 or 2K11. There isn't that much market up for grabs.