Steve Gardner | USA TODAY

USA TODAY

Add Hall of Fame pitcher Pedro Martinez to the list of current and former players who aren't happy with the way baseball's sign-stealing scandal originated.

Speaking Saturday at the Boston Red Sox's Winter Weekend, Martinez criticized former Houston Astros pitcher Mike Fiers for going public with details of the team's actions in 2017 -- after Fiers left the club.

"Whatever happens in the clubhouse stays in the clubhouse, and Fiers broke the rules," Martinez told Boston radio station WEEI. "I agree with cleaning up the game. I agree with the fact that the commissioner is taking a hard hand on this, but at the same time, players should not be the one dropping the whistle-blower."

Martinez said he would have been fine with Fiers coming clean while he was still on the Astros' roster, but doing it as a member of the Oakland A's -- and after he won a World Series with Houston -- made him "a bad teammate."

If Fiers objected to what the Astros were doing, Martinez said, he should have spoken up at the time. "But if you leave Houston and most likely you didn’t agree with Houston when you left, and then you go and drop the entire team under the bus, I don’t trust you."

The Red Sox are also under investigation for allegations that they stole signs electronically during the 2018 season, and Alex Cora lost his job as Boston manager for his role in the Astros' scandal.

Over the weekend, Boston slugger J.D. Martinez denied any wrongdoing, saying he was "excited for the investigation to get over with, just so they can see there was nothing going on here."

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