Mitch Keller, Pirates blank Cardinals

Gregory Polanco drove in two runs and Mitch Keller pitched five scoreless innings as the Pittsburgh Pirates notched a 4-0 victory over the host St. Louis Cardinals on Friday night.

Yoshi Tsutsugo added a pinch-hit homer in the ninth as the Pirates halted a five-game losing streak and won for just the third time in their past 18 games. Both of Polanco's RBIs came on sacrifice flies.

The right-hander Keller (4-10) struck