apparently only 1 pen didnt result in goal of total of 22 Ederson faced (PL only)
pen xG is around 0.8 or bit less, so on average 8 out of 10 is scored.
its hard to save a pen but its also hard imo concede 21 of 22.
What is the mean penalty save rate across all keepers in the league this season (not pen xG, which is a bit different and, depending on the source, calculated at a different frequency)?
I.e. is he on par or significantly over- or underperforming compared to baseline this season?
Whilst pen xG is helpful for aggregate, it won’t necessarily reflect whether penalty takers have simply gotten better at taking penalties in general this season (missing a penalty is different to a penalty being saved).
I don’t think anyone would claim he is particularly exceptional at saving penalties, but I think it would be helpful to determine how he stacks up to the baseline of league keepers before making a judgement about whether it is a real pronounced weakness comparatively (it may very well be).
Edit: had a moment so went ahead and determined it based on FBref data.
The mean penalty save rate across all keepers in the league this season is 6.73%. For 2022-2023 it was 16.08%. For 2021-2022 it was 12.84%. For 2020-2021 it was 11.67%. For 2019-2020 it was 19.44%.
We obviously have 10 more games to go this season, so who knows where the mean penalty save rate will finish, but we are far enough along to at least look at his performance compare to others this season. And it could be much lower than last season’s, which would halt a trend of increasing save rates, after a decent fall off between 2019-2020 and 2020-21.
Ederson’s career league penalty save rate, based on the league state you provided, is 4.54%. The mean penalty save rate over the last five years (including this incomplete season) is 13.35%.
So while his isn’t amazing, to be sure, it’s also not drastically terrible comparatively. And it could actually be pretty close to baseline this season if the save rate stays around where it is right now. It could be players have gotten better at taking penalties (or awareness from keepers of a more strict enforcement of the rules for penalties has lead to at least an initial increase in advantage to penalty takers).