Nice article! I think one thing to consider is that not all splits are necessarily equal. What I mean by that is a player considered to be an every day player isn't likely to be pinch hit for (like Rasmus). Therefore, he faces the nasty opposite hand starters and relievers as well as the average ones and scrubs. A player who is (at least partially) platooned in their career may not face the elite guys (Price or Sale for example, or a few of the lefty specialists that completely obliterate Lind). A guy who is actively platooned probably has those splits in spite of not facing the nastiest of the guys, whereas a guy who isn't could see the numbers improve against the other hand if moving into that situation.