The graph below takes Raul Ibanez and John Mayberry, Jr.’s performances in favorable (vs. opposite-handed pitching) and unfavorable (vs. same-handed pitching) platoon scenarios and compares them to an average NL batter in those same splits.
Notes: wXB/H is “Weighted Extra Bases per Hit,” a contact skill-neutral measure of power that I Frankenstein’d together here. Strikeout rate is inverted, so that lower strikeout rates are higher above league average.
As you would expect, Mayberry bests Ibanez in every category except for walk rate versus opposite-handed pitchers. His overall output, plate discipline, and power are all superior to those of Ibanez. The best thing that can be said for Raul Ibanez is that he has streaks of passable to good performance. When you stop creating generous endpoints for him, he is just a corner outfielder with poor defense who is hitting 10% below league average at the moment by wRC+. On many other teams he would be a bench bat — and blessed to hold on even to that role. Front offices less prone to considerations of loyalty and character, on teams whose fates were less assured, would have looked elsewhere for production weeks ago.
Still, we’re a few days away from the official submission of playoff rosters, and I can say with reasonable certainty that Charlie Manuel will start Raul Ibanez in left field for every playoff game. Granted, it’s more complicated than the above graph makes it seem. Ibanez has nearly twice as many plate appearances as Mayberry, and it will be a while before we can be certain that Mayberry’s improvements are the real deal. It’s also questionable how much their skill differential will really matter in the playoff rat race, where a good four or five plate appearances can turn an entire series.
But suppose the Phillies are knocked out shy of their ultimate goal. While we’re sitting around building narratives after the fact, as FuquaManuel detailed, will we at least consider this, a decision predicated entirely on non-baseball factors that objectively lowers the team’s offensive potential? Or will we brush it aside, credit Charlie Manuel again for being the “player’s manager,” and turn our attention to some other scapegoat?