What can Statcast tell us about the St. Louis Cardinals' catching situation?

Catcher Blocking

Catcher Blocking is a metric tool to express the skills of catchers preventing wild pitches or passed balls. The essential measurement in this tool is Blocks Above Average (BAA).

In 2023, the leader in baseball in BAA is J.T. Realmuto who has an 8 BAA. Andrew Knizner is 9th out of the 63 catchers listed with a 3 BAA. Sean Murphy is 23rd with a 0 BAA. Willson Contreras comes in at 53rd at a -2 BAA.

In 2021, Molina was 19th out of 71 in baseball with a BAA of 5.

Catcher Framing

Catcher Framing measures the art of a catcher receiving a pitch in a way that makes it more likely for an umpire to call a strike. The primary measurement is called Catcher Framing Runs (CFR)

In 2023, the leaders in this measurement are Sean Murphy and Jonah Heim with a 4 CFR. Out of the 57 Catchers listed, Andrew Knizner comes in at 19th with a 0 CFR, and Willson Contreras comes in at 28th with a 0 CFR.

In 2021, Molina's framing was 49th of 59, with a CFR of -3.

Catcher Poptime

Catcher Poptime measures the time from the moment the pitch hits the catcher's mitt to the moment reaches the fielder's projected receiving point at the center of the base. It's a combination of exchange time and arm strength. (PT) Poptime is measured in seconds, and the league average to second base is considered 2 seconds.

In 2023, the leader in baseball is J.T. Realmuto with a 1.81 (PT). Out of the 54 catchers listed, Sean Murphy comes in at 6 with a 1.89 (PT). In this metric, Contreras comes in at 13th with a decent Poptime of 1.93. Meanwhile, Knizner comes in at 35th with a 1.99 (PT).

Molina was still one the best in baseball in 2021, with a PT of 1.90, 6th out of 82.

Catcher Throwing

Catcher Throwing is a new metric added for 2023 which is designed to express the skill of catchers throwing out runners on steal attempts, given the opportunities they are presented with. (CSAA).

In this measurement, Elias Diaz leads baseball with a CSAA of 5. Out of the 56 catchers listed, Sean Murphy comes in at 10th with a 2(CSAA), Contreras comes in at 12th with a 1(CSAA), and Knizner comes in at 14 with a 1 (CSAA). Not bad for any of the Cardinal receivers.

In 2021, Molina showed he still had a strong arm with a CSAA of 6, 2nd of 50 catchers in the metric.

So, what does Statcast tell us about the Cardinals catchers?

It tells us it was too bad the Cardinals couldn't close the deal with the As for Sean Murphy. A leader in most of the Statcast categories for catching would have given the Cardinals a catcher closer to what Yadier Molina was in his prime.

It seems too much of a mixed bag with Knizner and Contreras for the Cardinals to make the move they made. Knizner is the much better catcher at blocking and framing, and Willson Contreras has a stronger arm than Knizner.

It's unlikely Knizner's better blocking and framing were the reason Contreras was removed from catching for a week. The Statcast difference between the two are just not that significant. It had to be beyond what Statcast tells us.

What Statcast doesn't tell us

What Statcast doesn't tell us is the impact of Yadier Molina's leadership in the clubhouse, especially when it comes to game planning with the pitchers and managing the game while in progress.

Molina's impact on the organization is best described by A.J. Pierzynski, who backed up Yadi during the last half of the 2014 season. In an interview with the Foul Territory podcast, Pierzynski said, "I never seen one player run an organization the way Yadi did."

Yadier Molina's defensive accomplishments are easy to measure, even before Statcast was in existence. Winning nine Gold Gloves during his career attests to it. What Statcast can't measure is his leadership and his baseball IQ.

This is something Contreras can't duplicate or even should be expected to. Molina is a generational talent.

The Willson Contreras controversy was less about Contreras and his catching skills than it was about a franchise learning to live without Yadier Molina.