In 2006, Hanely Ramirez won the Jackie Robinson Award for best rookie by four points over Ryan Zimmerman. The two were very close, with Ramirez a slightly better hitter and Zimmerman the better defender. Since then, however, Ramirez continued his development as a hitter while Zimmerman goes backward:

In Zimmerman’s defense, halfway through May last season his OPS was .669. That meant, however, he really needed to play well to close to where he finished his rookie season. The same thing needs to happen this year. His slugging percentage is picking up. Saturday night he hit his third home run in five games. He’s still not getting on base however.
Zimmerman and Ramirez are both young players. Neither has reached their prime age for hitting. Ramirez, however, is developing as a young star should, and helping the Marlins to a surprising season. Zimmerman should be star on Washington, but two years in a row slow starts are hampering his development. Playing well for only 120 games out of the year does not propel a player into super stardom.