White Sox center fielder Luis Robert exited Game 4 of the ALDS on Tuesday with right leg tightness.
Adam Engel replaced Robert in center in the top of the seventh inning with the White Sox trailing the Astros 6-1.
Robert hit third in the order on Tuesday and registered one of the Sox five hits at the time of his exit.
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He's been one of their most productive hitters in the series vs. Houston, going 7-for-15 in the four games with a pair of walks.
More to come.