**UPDATED 4 June
Rookie watch is a feature that looks at hitters and pitchers and attempts to evaluate them in a ranking based upon the given statistical categories. I believe that wOBA for batters and SIERA for pitchers make the most sense as the foundation of these ratings. wOBA weighs just about everything a hitter is able to do offensively and SIERA is fielding-independent and takes park and league factors into the calculation.
For batters, weight will be given to wOBA in relation to the amount of plate