Keller will start Game 1 of Wednesday's doubleheader against the Yankees, Colin Beazley of the Pittsburgh Post-Gazette reports.
Keller will take the ball in Wednesday's matinee after Tuesday's contest was postponed due to inclement weather, causing the Pirates to participate in a third doubleheader since July 11. The right-hander has struggled to a 7.62 ERA and 1.74 WHIP with 31 strikeouts over 39 innings in his last eight starts, surrendering nine home runs over that stretch.