Jason Heyward or Buster Posey: Which Star Is More at Risk of 'Sophomore Slump'?

Jason Heyward and Buster Posey emerged as two of baseball's brightest stars. The 21-year-old Heyward and soon-to-be 24-year-old Posey are coming into their second seasons in the majors and both are already facing enhanced expectations.

They battled all year long for the National League Rookie of the Year Award. Heyward was awarded Baseball America's award, while Posey received it from the majority of others. Both players were deserving of the award, so it's hard to complain on who won.

They both face the possibility of a "sophomore slump" due to high expectations and their success as rookies. So in this list we will take a look at the person that is more likely to see a regression in their numbers.

So let's get on with the list.

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