Astros' Greinke holds up 2 fingers, then allows HR on slider

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Houston Astros' Zack Greinke pitches against the Oakland Athletics during the first inning of Game 4 of a baseball American League Division Series in Los Angeles, Thursday, Oct. 8, 2020. (AP Photo/Marcio Jose Sanchez)

LOS ANGELES – Houston pitcher Zack Greinke' held up two fingers toward Oakland's Ramón Laureano and Astros catcher Martín Maldonado in the second inning of their AL Division Series Game 4 on Thursday, and Laureano hit a hanging slider 440 feet to left for a tiebreaking three-run homer.

Could Greinke have been signaling his pitch?

Greinke has at times used a hand signal to switch sign sets mid-inning with Laureano.

Laureano entered 3 for 22 in the postseason but didn't seem concerned about facing Greinke.

“We know all of the pitches. It just another guy on the mound," Laureano said before the game. "Go out there and hopefully we have the best performance we have ever had.”

It is the first postseason homer Greinke allowed since last year's Game 7 of the World Series against Washington, when Anthony Rendon's solo shot began the Nationals' comeback.

Greinke was announced as the Game 4 starter by manager Dusty Baker about three hours before the scheduled first pitch.

The 2009 AL Cy Young Award winner is Houston's most experienced starter but has been dealing with arm soreness. Greinke, who turns 37 on Oct. 21, threw off flat ground after Tuesday's game and told Baker Thursday morning he was ready to go.