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On manager Dusty Baker's birthday, Jose Altuve's 10th-inning walk-off grand slam lifted the Astros to a 6-3 win over the Rangers in the first of a pair between the in-state rivals. Houston also needed heroics to force extra innings, down to their last strike in the bottom of the ninth when Carlos Correa hit a game-tying solo shot. Joey Gallo drove in two runs for the Rangers, while Lance McCullers threw four-and-a-third innings in his return to the Astros rotation. Jordan Lyles duels Zack Greinke in the rematch tonight.