Houston Astros left-hander Framber Valdez, coming off his best start of the season, will look for another positive result when he opposes Pirates right-hander Mitch Keller in the rubber match of a three-game series in Pittsburgh on Thursday night.

Each team has shut out the other in the first two games of the series, with Houston winning 3-0 on Tuesday and Pittsburgh prevailing by the same score on Wednesday.

Valdez (5-4, 3.12 ERA) threw a complete game on Friday, striking out nine and allowing only one run on three hits and a walk in a 2-1 home win against the Tampa Bay Rays.

Keller (1-7, 3.73 ERA) is still looking for his first victory since March 28 but has continued to deliver strong starts, as he did on Friday against the host San Diego Padres. Keller allowed three runs on three hi

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