What follows represents an attempt by the author to utilize the projections available at the site to identify the five major-league hitters whose wOBA projections have most improved since the beginning of the season.
For every batter, what I’ve done is first to calculate his preseason (PRE) wOBA projection, averaging together Steamer and ZiPS forecasts where both are available. What I’ve done next is to calculate every hitter’s rest-of-season (ROS) wOBA projection (again, using both Steamer and ZiPS when available). I’ve then found the difference in wOBA between the preseason and rest-of-season projection.
When I attempted a similar exercise last month (with WAR, in that case), I used updated end-of-season projections instead of rest-of-season ones. The advantage of the latter (and why I’m using it here) is that it provides the closest available thing to an estimate of any given player’s current true-talent level — which, reason dictates, is what one requires to best identify those players who have most improved.
Only those hitters have been considered who both (a) are currently on a major-league roster and (b) weren’t accidentally omitted by the author, who is a moron. Note that Projection denotes a composite Steamer and ZiPS projection. PRE denotes the player’s preseason projection; ROS, the rest-of-season projection. Plate-appearances estimates for both PRE and ROS projections are taken from relevant batter’s depth-chart projection. Data is current as of Monday.
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5. Devin Mesoraco, C, Cincinnati (Profile)
Projection (PRE): 413 PA, .247/.308/.413 (.274 BABIP), .313 wOBA, 96 wRC+
Projection (ROS): 240 PA, .260/.320/.438 (.288 BABIP), .330 wOBA, 107 wRC+
Notes
In 160-plus career starts for the club, Mesoraco has served as Cincinnati’s cleanup hitter just three times. In five starts since last Monday, Mesoraco has also served as Cincinnati’s cleanup hitter three times. In part, the loss of Jay Bruce and then (upon Bruce’s return) Joey Votto has facilitated the move. In part, it’s Mesoraco’s own production which has suggested to manager Bryan Price that his catcher ought to occupy one of the most important spots (both symbolically and actually) in the Reds lineup. Notably, Mesoraco’s plate-discipline projections haven’t improved at all. Rather, it’s his early BABIP and power-on-contact figures which have led to his more encouraging forecasts.
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