The American League Division Series between the Boston Red Sox and New York Yankees featured all the fireworks you’d expect from two 100-win teams squaring off: Yankees slugger Aaron Judge played “New York, New York” on a boombox as he walked past the Red Sox clubhouse after the Yankees won Game 2, and the Red Sox responded by playing the Sinatra classic in their own clubhouse in New York after they clinched the series in Game 4.

But if there was one thing the rivals agreed on, it was the awful performance of Angel Hernandez, who umpired at first base in Game 3 and behind the plate in Game 4. At first base, four of his calls were challenged and instant replay overturned three of them. He drew the ire of Red Sox legend Pedro Martinez, the Yankees’ in-house YES Network, CBS Sports, and others.

“Major League Baseball needs to do something about Angel,” said Martinez after Game 3. “He’s as bad as there is.”

And then came Game 4. Red Sox left fielder Andrew Benintendi jawed with Hernandez after a questionable strikeout to end an inning but it was Yankees starter C.C. Sabathia, who took the loss, who had the most to say.

“I do need to say this though. I don’t think Angel Hernandez should be umping playoff games. He’s absolutely terrible.” Sabathia said. “Terrible behind the plate today, terrible at first base. It’s amazing how he’s getting a job to umpire in these playoff games.” Asked if other players would agree, Sabathia replied “everybody out there. I think if you go ask them on the other side too.”

Hernandez’s problems are not limited to the just-completed ALDS. Taking data from across his career, FanGraphs found some bizarre tendencies in Hernandez’s strike-calling: He seems to be the only umpire who will occasionally call a pitch right down the middle a ball. To quote Sabathia, Hernandez is like this “always. It’s always. He’s bad.”

Here’s the twist: Hernandez is currently suing Major League Baseball for discriminating against minority umpires, specifically by not putting him in important games more frequently. He singled out Joe Torre, former Yankee manager and current chief baseball officer for the MLB, for hindering his career over a personal grudge. The U.S. District Court moved the case to New York early this month.

Hernandez’s suit comes at a critical time for himself and fellow umpires. Baseball already has the technology to call balls and strikes automatically; TV broadcasts use it all the time. Plays in the field are now subject to instant replay. The World Umpires Association, which represents all MLB umpires, simply doesn’t have the leverage right now to be making major demands, and one umpire (especially a bad one) going rogue with a lawsuit might cause the league to ask itself why it should deal with human umpires at all.

There’s a sure-fire way to avoid the technology crisis: fire Angel Hernandez. Umpires can come to terms with new technology without losing their jobs if they allow baseball’s new tools to keep them accountable. If the Umpires Association is really concerned about bias, the answer is not to make human umpires more of a headache. A far better approach is to take advantage of new high-tech ways to measure umpire performance and let the objectively bad ones get cut, while, on the flipside, more accurately identifying minority umpires who actually deserve promotion. But it has to start with some quality control. It has to start with Angel Hernandez.