The Astros were up by four to start the ninth inning against Oakland on Tuesday night when Giles took over and gave up three straight singles which cut the lead to 4-1.
Hinch came to the mound to take out Giles and the television broadcast caught him appearing to curse at Hinch right after he walked by him on his way off the field.
It was the second major outburst of the year for the right-hander, who punched himself in the face as he left the mound after another bad performance earlier in the season.
Houston went on to win Tuesday night’s game 6-5 in 11 innings.
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