Chicago White Sox ace Lucas Giolito is pitching a perfect game through six innings against the Oakland Athletics in their playoff opener.

Giolito has thrown 73 pitches Tuesday at the Coliseum in his postseason debut.

Giolito pitched a no-hitter against Pittsburgh on Aug. 25.

Chicago White Sox's Lucas Giolito pitches against the Oakland Athletics during the fourth inning of Game 1 of an American League wild-card baseball series Tuesday, Sept. 29, 2020, in Oakland, Calif. (AP PhotoEric Risberg)

Chicago White Sox's Lucas Giolito pitches against the Oakland Athletics during the fourth inning of Game 1 of an American League wild-card baseball series Tuesday, Sept. 29, 2020, in Oakland, Calif. (AP PhotoEric Risberg)

Jake Lamb's line drive to center field in the fifth was the hardest-hit ball by the A's against the 27-year-old Giolito.

Giolito has struck out six, and yelled after fanning the side in the sixth.

The White Sox lead 3-0 in Game 1 of the best-of-three series.

Chicago White Sox pitcher Lucas Giolito (27) walks to the dugout after retiring the Oakland Athletics in the fourth inning of Game 1 of an American League wild-card baseball series Tuesday, Sept. 29, 2020, in Oakland, Calif. (AP PhotoEric Risberg)

Chicago White Sox pitcher Lucas Giolito (27) walks to the dugout after retiring the Oakland Athletics in the fourth inning of Game 1 of an American League wild-card baseball series Tuesday, Sept. 29, 2020, in Oakland, Calif. (AP PhotoEric Risberg)

The late Roy Halladay of the Phillies in 2010 threw a perfect game in the regular season and then tossed a no-hitter against the Reds in the playoffs — the only person to have a regular-season and postseason no-hitter in the same year.

Halladay and Don Larsen, who pitched a perfect game for the Yankees in the 1956 World Series against Brooklyn, have the only two postseason no-hitters.

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