Weekly Catcher Review - 4/19

Posted on 2017-04-19 16:18 by Ray Flowers




We’re only a week into the season, so it’s a bit dangerous to read too much into most of the data we have at our finger tips. That said, it’s never too early to start looking at the information that we do have. Every Monday I’ll do my best to take a look at the men who wear the tools of ignorance. We will take a look at catcher’s ability to slow down the running game, work with a pitching staff and help their hurlers by helping them out in the old pitch framing department.

CSAA (From Baseball Prospectus): Calculated on called pitches by an umpire, it speaks to the addition strikes gained for the hurler, i.e., the bigger the number the better the catcher is at framing pitches.          

Calls: The percentage of pitches that are turned into strikes (a + score) versus those turned into a ball (a - score). A plus score means the catcher is helping his pitcher get close pitches.            

zBall%: The percentage of pitches caught, within the strike zone, called a ball

oStr%: The percentage of pitches, caught outside the strike zone, called a strike

RAA: Runs Above Average

RAA/Chance: Note that RAA is really a compilation stat. Therefore, catchers with a higher number are the fellas that are racking up the starts. To give you a context for the number that removes workload you can check out RAA/Chance. This category measures the amount of chances needed per saved run. The smaller the number the better the catcher is at helping his hurlers. Oh, and the negative guys, they will not be helping out their pitchers any time soon. Until a player posts a positive RAA he’s trending in the direction of hurting his hurler. Obviously, the higher the number the better the defender is performing.        

Here’s the data in terms of steals and catcher’s ERA.


A: Assists

PO: Put Outs

E: Errors

PD: Passed Balls

CERA: Catcher’s ERA, or CERA, is a very simple concept. CERA records the ERA of a club's pitchers with a particular catcher behind the plate. To figure this metric simply multiply the earned runs allowed by pitchers while that specific catcher was behind the plate, multiply that number by nine, and then divide that number by the innings caught (ER while catcher was behind the plate*9) / IP). CERA tells you what a staff’s ERA is when a catcher is behind the plate, more indicative of a catcher’s game calling skills than looking at a team’s overall ERA.

Range Factor: (Putouts + Assists) / 9 innings

SBA/9INN: The number of steals attempted versus the catcher per nine innings.


Ray Flowers can be heard Monday/Tuesday and Thursday/Friday, 7 PM EDT, Wednesday 8 PM EDT on SiriusXM Fantasy Sports Radio (Sirius 210, XM 87). You can also hear Ray Sunday nights at 8 PM EDT PM on the channel talking fantasy sports. Follow Ray’s work on Twitter (@baseballguys).