Posted:
#1
Was meaning to post this before the game but did not have time. Dan Iassogna is from southern CT, 95%+ chance he is a Yankees fan and ironically his numbers/Yankees numbers in game that he is the home plate ump back up that he probably has a bias for the Yankees, while umping.
For example, the Yankees have been a very good team in Yankees Stadium(s) over the past 10 years: 522-287 for a 0.645 win percentage. Iassogna has worked 14 games behind the plate at Yankee Stadium(s) in that time frame. The Yankees have lost 1 of those games. Just to clarify, the Yankees have gone 13-1 (0.929) in games Iassogna has been the plate umpire in Yankee Stadium. The probability of observing data this extreme is 5%.
36 umpires have had home plate at least 10 times in Yankee Stadium over the past 10 years. The Yankees have had the highest win pct in front of Dan Iassogna. But they have performed similarly in front of a small number of other umps. Here is a list of Yankee win-loss records in Yankee Stadium for some umpires:
Dan Iassogna 13-1
Gary Cederstrom 12-1
Bill Welke 11-1
Bruce Froemming 10-1
Here are a list of the four guys on the other end of the distribution
Hunter Wendelstedt 4-7
Mike Everett 6-7
Mark Wegner 7-8
Angel Hernandez 7-6
So to summarize, the Yankees were roughly a 0.645 team at Yankee stadium over the last 10 years. The Yankees were a combined 24-28 when the four most "generous" umps to the opposition were working. That is a 0.462 win percentage. Significantly lower than 0.645 for sure, but that would be expected since we sampled the four most extreme. For those who like p-values, that would be a 0.007 chance.
Now, what about our original four who seem to be "generous" to the Yankees at home. The Yankees were a combined 46-4 when they worked, an unheard of win percentage of 0.920. That's a p-value of 0.0003.
For example, the Yankees have been a very good team in Yankees Stadium(s) over the past 10 years: 522-287 for a 0.645 win percentage. Iassogna has worked 14 games behind the plate at Yankee Stadium(s) in that time frame. The Yankees have lost 1 of those games. Just to clarify, the Yankees have gone 13-1 (0.929) in games Iassogna has been the plate umpire in Yankee Stadium. The probability of observing data this extreme is 5%.
36 umpires have had home plate at least 10 times in Yankee Stadium over the past 10 years. The Yankees have had the highest win pct in front of Dan Iassogna. But they have performed similarly in front of a small number of other umps. Here is a list of Yankee win-loss records in Yankee Stadium for some umpires:
Dan Iassogna 13-1
Gary Cederstrom 12-1
Bill Welke 11-1
Bruce Froemming 10-1
Here are a list of the four guys on the other end of the distribution
Hunter Wendelstedt 4-7
Mike Everett 6-7
Mark Wegner 7-8
Angel Hernandez 7-6
So to summarize, the Yankees were roughly a 0.645 team at Yankee stadium over the last 10 years. The Yankees were a combined 24-28 when the four most "generous" umps to the opposition were working. That is a 0.462 win percentage. Significantly lower than 0.645 for sure, but that would be expected since we sampled the four most extreme. For those who like p-values, that would be a 0.007 chance.
Now, what about our original four who seem to be "generous" to the Yankees at home. The Yankees were a combined 46-4 when they worked, an unheard of win percentage of 0.920. That's a p-value of 0.0003.
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