Whether you believe it or not, Philip Humber of the Chicago White Sox has thrown a perfect game against the Seattle Mariners.

The game marks the 21st time in Major League history that a pitcher has retired all 27 batters he faced in a single game. He’s the first to do it since Roy Halladay in May of 2010 and the first member of the White Sox since Mark Buehrle in July of 2009. He did so with nine strikeouts and just 96 pitches.

No word yet on whether or not Major League Baseball will only credit Humber with a partial perfect game due to the fact that he was facing the Mariners at Safeco Field.

Humber is a former first-round pick of the New York Mets and was the centerpiece of the Johan Santana-trade. Things never quite panned out for him with Minnesota and he appeared to be on his way out of baseball when he was claimed by the Chicago White Sox off of waivers ahead of last season.

In 2011, Humber rejuvenated his career posting a solid 3.75 ERA and 3.86 xFIP in 163 innings of work and has looked very good so far this season.

Humber absolutely dominated in this game, inducing 14 swing-and-misses and allowing only two 3-2 counts, both of which came in the ninth inning. He threw more than 12 pitches in an inning only twice and threw a total of 19 through innings four, five and six.

Humber used mostly his four-seamer and curveball while mixing in his slider against righties and tossing the odd changeup and two-seamer to keep hitters off balance. Humber mixed his speeds very effectively with his fastball topping out at 94 MPH (averaging 91.55 MPH), and his curveball sitting routinely in the high-70s and low-80s.

He also very effectively changed the plain of the hitter with terrific movement on all his pitches. His fastballs and changeup were routinely breaking in at righthanders, while his breaking pitches broke down and away.

Humber’s resurgence, evident long before today, has been nothing short of incredible. At least some of the credit has to go White Sox pitching coach Don Cooper who not only cleaned up Humber’s delivery, but helped him find more movement on his fastball which has clearly had a huge effect.