With MLB, be careful how you use the site. MLB took the historic stance with baseball stats and it's effects on MLB licenced sites/games. There is a lawsuit with CDM Sports against MLB in regards to this.
With that said, anytime you use a TM, there can be trouble. There is legal and reality. Legally, using a TM without permission is against the law, but in reality, the TM holder enforcing thier TM is a different story.