That honor belongs to the Giants' Matt Cain, who threw the 22nd perfect game on Wednesday in a 10-0 victory over the Astros in San Francisco.
"It's crazy, the amount of near no-hitters and no-hitters and perfect games that have happened the last few years," Humber said. "Who knows? Maybe it'll be a long time before the next one, but it's fun to see that. He pitched a great game. Obviously, very dominant the stuff I saw. He was really locked in."
Humber caught highlights of the game and marveled at the brief period of time between his perfect game -- which he threw on April 21 against the Mariners -- and Cain's perfect game. There had been two perfect games in a season twice before -- in 2010 and 1880. The perfect games in 1880 were separated by five days. Roy Halladay and Dallas Braden threw perfect games 20 days apart in 2010.
Cain's perfect game arrived 7 1/2 weeks after Humber's.
"Just to think there have only been 22 of them, to have two of them happen so close together, it seems like the chances of that are pretty slim," Humber said. "That's why baseball is a great game. You never know, on any given night, something special can happen."
Humber has never met Cain."It was just really neat to see," Humber said. "Just following his career, he seems like a really quality guy, obviously a pretty talented pitcher. Hats off to him."
Humber is former teammates with Giants center fielder Gregor Blanco, who made a leaping catch to save Cain's perfect game.
"That was outstanding," Humber said. "I played with him with Kansas City. It was really neat to see him do that."