Carson Benge had a 20-20 season with roughly 600 at-bats. Nolan McLean almost pitched 180 innings and had 200 strikeouts. They both had tremendous seasons for first year players but neither made the N.L All-star team.
It is a difficult decision, but I would vote for Nolan McLean. I feel that the season he had pitching is rarer than being a 20-20 player as a rookie. Not to mention before the season he pitched for team U.S.A in the W.B.C as their Ace and Championship game starter.