Los Angeles Dodgers pitcher Tyler Glasnow left Tuesday's game against the Houston Astros in Houston due to low back pain. The 32-year-old right-hander had a strong start, allowing only a home run to Brice Matthews and striking out two batters in the first inning, which included his 1,000th career strikeout. However, after warming up for the second inning, Glasnow appeared to be in discomfort and signaled to the dugout for assistance. Dodgers manager Dave Roberts and other staff members came to check on him, and after a brief discussion, he walked off the field. Glasnow was replaced by Jack Dreyer. Last season, Glasnow was limited to 18 regular-season starts due to right shoulder inflammation that kept him out from late April until early July.