Manny Machado is unarguably going to be a star for a long time, but is it possible that breakout stars like Patrick Corbin and Josh Donaldson could be one-hit wonders?
With all due respect, not everyone who has a great season is going to follow it up with a comparable season any time thereafter.
Just in 2009 alone, Jason Bartlett, Chone Figgins, Franklin Gutierrez and Nyjer Morgan each posted a WAR of least 5.0.
Morgan (3.6 in 2011) is the only person from that group to have a single-season WAR of more than 2.2 since.
Some players disappear from the spotlight just as suddenly as they got there.
Of this season's 13 breakout stars—as defined on the next slide—there are at least five who are destined to follow the unmemorable career arc of Junior Spivey.
*Unless otherwise cited, all statistics are courtesy of FanGraphs and are accurate through the start of play on Thursday, Aug. 8.