Ozzie Guillen absolutely loathes the idea of an automated strike zone in the MLB ... telling TMZ Sports he thinks robot umps are "the worst thing I've ever heard in my life."
The former Chicago White Sox manager went in on the idea when we asked him this week about the potential rule change -- saying he has no clue how it'd make the game better.
"I hope [the rule change] happens after I die," Guillen said, "because I'll be very, very vocal about it."
The MLB is considering the move down the road -- after it implemented automated strike zones for the 2022 Triple-A season.
The idea is that if it goes well in the minor leagues, it could eventually end up replacing humans behind the plate one day in The Show -- and make a more uniform ball-and-strike zone there.
Guillen, though, said it's a slap in the face to the current umps ... and he also doesn't understand how a computer could do a better job than a human who's standing just inches away from the pitches.
"Whoever came up with this idea never played the game," Guillen said. "Never played Little League baseball games."
Guillen is in favor of adding one rule back to the game ... telling us he'd like to see more roughness come back. He explained he's hoping the league will allow hard slides into second base and into home plate again eventually.
As for if Guillen will ever manage again -- he said he's hopeful after getting an interview with the San Diego Padres last year that a team will give him another shot.
"I love baseball," the 58-year-old said. "It's in my veins. I love to compete. I love to be around everything around baseball. It's something I miss."