On Crede, no. He's not the best player on his own team, and he's not the most valuable, either. He might not even be in the top three. Guy finally came into his own and is having a great season, but he's not an MVP.
Back to the NL. Right now, he's not a candidate, but if he goes on a HR binge and his team makes the playoffs, let's consider this player's current line:
.336-17-76, .430 OBP, .554 SLG (.984 OPS), and doing it without a Rolen, Delgado, Thome support system in his lineup. Yes, I'm talking about Miguel Cabrera. In a lineup like his, he wasn't supposed to get pitches to hit, so instead of focusing on jacking balls out of the yard, he's merely a top candidate to win the batting title. If - big if - he gets to the 30 HR-110 RBI plateau without the other numbers dropping, and - bigger if - the Marlins make a serious run at the Wild Card, Cabrera has to be a big, big candidate, because his team sure wouldn't be anywhere near where they are without him.