Having a great first season in the majors while in your mid-20s is a rare thing. Sure, there are late bloomers – Paul Lo Duca and Maury Wills immediately come to mind – but most of those late bloomers need a cup of coffee or four before they make a noteworthy impact.

In fact, in the 55 seasons of the Los Angeles Dodgers, only 19 players have notched at least 100 plate appearances in their first season after turning 24. And of those 19 players, so far, Elian Herrera (who added two doubles and three RBI Friday to his magical 2012) has a higher on-base percentage and adjusted OPS than any of them.

It’s not as if he can claim a better first season than Andre Ethier had in 2006, for example, but it’s still pretty amazing. In fact, even if you eliminate the age component, Herrera still has the fifth-best season in adjusted OPS for a Dodger in his first season, and second-best OBP.

Using Wins Above Replacement, a cumulative stat as measured by Baseball-Reference.com, Herrera is already the Dodgers’ 20th-best first-year major-leaguer … with room to climb.

This won’t guarantee future stardom – several of these players are balloons that inflated quickly and then popped. It’s not like Dick Gray carved out a legendary career But it is a measure of just how valuable Herrera has been to this point. I can’t think of a bigger surprise for the Dodgers in 2012.