The 29-year-old trashed the Astros for reading off prepared statements last week while displaying an apparent lack of remorse and sincerity.
"Why would you need a piece of paper to say sorry for being the biggest piece of shit in baseball history?" Clevinger said Thursday on Barstool Sports' Starting 9. "I don't understand that, but they did. They needed a piece of paper and read it like a robot. First I've ever heard those boys talk about it.
"They just keep on referring to one year when everybody in the right mind knows it was every single year and they just got caught."
This isn't the first time Clevinger has ripped the Astros, as the starting pitcher said in mid-January that sign-stealing is "worse than steroids."
Cleveland and Houston meet in back-to-back spring training games on March 23-24, but Clevinger is currently nursing a knee injury that will keep him out for six-to-eight weeks. The two teams play for the first time during the regular season on June 29.