I noticed on baseball-reference.com that it was Eric Davis' birthday. If he is not the classic "what if" player, he is in the discussion.
Never did Davis get more than 474 ABs in a season. The year he got 474, in 1987, he batted .293/.399/.593. He had 37 HR, 100 RBI, 120 R and 50 SB in 129 games. He also won a Gold Glove. Amazingly, that performance landed him only 9th in the MVP voting. That was the year Andre Dawson won with the last-place Cubs, so go figure.
Davis was the first player to hit 25+ HR and steal 80 bases, in 1986. Rickey Henderson later joined him in the club that same season. They are the only two players to accomplish the feat.