Hard for me to believe that defensive number. They have a player struggling to stay above the Mendoza line at catcher instead of Herrera.rbirules wrote: ↑17 Jul 2025 15:48 pmSorry, maybe I didn't phrase that well, or explained it poorly.ScotchMIrish wrote: ↑17 Jul 2025 15:27 pmBut he is one of if not the worst catcher in MLB. Why would he get +12.5? He isn't a baseball player. He is a batter.rbirules wrote: ↑17 Jul 2025 15:19 pm Herrera doesn't get a higher WAR because he can DH. He has to hit enough to overcome the massive positional adjustment for the DH (-17.5 runs) compared to catcher (+12.5 runs) over a full season. That's 30 runs or 3 WAR he loses if he hit exactly the same over a full season playing DH vs. playing catcher. Is his defense at catcher -30 runs bad? We don't know. For his career he has -10 DRS at catcher, in 721 innings (80 games) which is about half a season, if catcher's played all 162 games, which they don't. If you merely extrapolated his defensive metrics across a full season he'd come out ahead as a catcher by 10 runs (+30 positional adjustment, -20 DRS), or 1 WAR.
Statcast defensive metrics have him at -3 runs over his career (80 games) so he'd be losing even more value at DH if you don't trust DRS.
Herrera's numbers while in the DH spot should absolutely be counted. He if played half a year at DH and half at catcher he'd get half the DH positional adjustment (-17.5/2 = -9 runs) and half the catcher positional adjustment (+12.5/2 = +6 runs) for a total positional adjustment of -3 runs (-2.5 to be exact).
Things that aid the other teams offense (stealing bases, advancing on passed balls, etc.) are factored into the catching defense portion of WAR.
Not trashing Herrera just pointing out the fraud of WAR.
The positional adjustment between catcher and DH over a full season is 30 runs, or 3 WAR. But that's for an average defensive catcher which we know Herrera is not. In order for his WAR to be better off with him DH-ing full time instead of catching he'd have to give back 30 runs defensively. As I showed depending on the defensive metric source you prefer he's been -10 runs or -3 runs in his career over 80 games behind the plate. If he played catcher half the time and DH half the time he'd need to be -15 runs defensively at catcher in 80 games to be worse off.
He gets the prorated +12.5 because playing catcher is hard. Really hard. From there a player can gain (like Yadi) or lose (like Herrera) defensive value, but +12.5 is the starting point for catcher and -17.5 is the starting point for a DH.
If Herrera's career was a season he'd get +6.25 for the 80 games he caught, and then -10 (or -3) runs for being bad defensively, for a net -3.75 (or +3.25) runs defensively. Then you'd do the same for the games he was a DH -17.5 runs x (# of games at DH) / 162, then you'd add those two together.
Again, this isn't a problem with WAR, and this is actually a great example of a question that WAR is useful in answering. Are the Cardinals better off with Herrera at DH or catcher? It depends on his own performance at catcher (and how much you believe those defensive metrics in small samples, he's got a terrible arm though) and the team's depth at both positions.
I stick with my belief offense while DH should not be figured into WAR.