Cubs Epic Blunders

On Wednesday night, with the bases loaded and the game tied, one out in the bottom of the ninth, Mike Wuertz struck out Pat Burrell swinging. Michael Barrett though allowed the ball to get away, and though he recovered in time to catch Jimmy Rollins in no man's land, marooned between third and home, Barrett then literally threw the game away. What ought to have been a simple inning-ending rundown turned into a catastrophic game-ending score. And that led me to think, just how bad is Barrett's defence? And to what extent does it undermine his rather more quantifiable offensive value? The common consensus, which is based based largely on just watching the two behind the plate and with which I agree, is that Barrett is at best a mediocre defensive catcher, but that Henry Blanco is a fine defender, one of the best in the game. Perhaps it would be interesting to monitor just how the two have fared so far this year. There are plenty of complex defensive metrics around that aim to measure defence, but I generally find them just too obscenely obscure, abstract, incalculable, contradictory etcetera. But Catcher ERA, a very simple yet alarmingly crude and therefore flawed statistic, gave me an idea - calculate each pitcher's line throwing to Barrett, and then their line throwing to Blanco, and see what that throws up. And so I did...