Yasiel Puig's Major League Baseball career is off to an impressive start, though this is hardly the first time we've seen immediate dominance from a young player. In past generations and even recently, rookies have enjoyed comparable success following their initial call-up.
Entering June 25, Puig is 20 games into MLB life. The sample isn't insignificant, but anything smaller would be.
Therefore, the individuals on this list—those who wowed us as fantastic freshmen—made it because they maintained a high quality of performance for at least as long as Puig has. For starting pitchers and relievers, we looked at career-opening stretches of at least five and 10 games, respectively.
Many of the truly timeless first-year performances began with awkward swings and shaky command. Even Ryan Braun and Ted Williams, who finished with fantastic numbers, dealt with dry spells during series early in their careers.
They failed to make the cut.
Still, the typical baseball fan shouldn't have much trouble recognizing these 20 names. They hogged headlines for weeks, months or even an entire season before finally cooling off.
All game logs and monthly splits provided by Baseball-Reference.com.