Chicago Cubs rookie Pete Crow-Arstrong has quietly been on a heater as of late. Reaching first base on a walk, the 22-year-old outfielder showed off his speed to swipe second base in the seventh inning. That makes it 21 straight steals for Crow-Arstrong without being tagged this season, which ties the mark for the second-most by a rookie since caught stealing began being tracked in 1951. The California native is batting .304 over his last seven games.