Pete Fairbanks was unhappy after Friday’s loss and went on the offensive with his postgame interview.

The Rays closer walked three hitters before bullpen-mate Jason Adams entered and ceded a walk-off grand slam to Rockies third baseman Ryan McMahon. In the postgame locker room, he placed the blame on the Coors Field humidor and the consistency of baseballs.

“They were horrible, you can mark that down, all caps for me — horrible,” Fairbanks said. “I’d love to see those come out of the humidor tomorrow in a little better shape before they get rubbed up. I’m not gonna elaborate further than that, they were not uniform from ball to ball.”

Jalen Beeks, a former teammate of Fairbanks, said that he was a great teammate and guy, but that emotions can get to a pitcher after a bad outing, no matter what role.

When asked to clarify the ball situation, Rockies manager Bud Black referred to the professionalism of the staff in charge of balls at the high-altitude ballpark.

“I know the process that our guys go through to get the balls ready for a major-league game is very professional,” Black said Saturday. “It’s really one of the first times I’ve heard that. I don’t know this guy, but it was a little surprising.”

Fairbanks threw 17 pitches, and only five were in the zone in his abbreviated outing. In 45 ⅓ innings in 2023, he walked 20 hitters and struck out 68 as the team’s closer.

In the past, Colorado was also accused of doctoring baseballs by then-San-Francisco starter Tim Lincecum in 2010. At the time, MLB Vice President Pat Courtney responded by ensuring umpires would watch and be aware of the club’s preparation process for baseballs after the starter accused the Rockies of using different balls when hitting versus the ones given to their own pitchers.

“It’s just one of those things that’s in the back of your mind,” Lincecum told the Mercury News after cameras caught him complaining in the dugout. “If it’s happening or not, it doesn’t really matter.

“Just give him the ball back and get a fresh one. I got three or four balls where I thought that (they weren’t) necessarily juiced, but they didn’t feel as rubbed down or like the other balls I’d gotten back.”

The league didn’t find any wrongdoing but put protocols in place at the time, and they have stayed in place since.

MLB added humidors for all 30 parks in 2022, but conditions at respective parks add different elements — Beeks said pitching in humidity is different than his experience in Colorado, for example.