The D-backs have their first day off of the season Monday before opening a three-game series with the Astros on Tuesday night at Chase Field. First pitch is at 6:10 p.m. MST, available live on MLB.TV, and will feature Arizona ace Madison Bumgarner on the mound. Bumgarner is searching for his first win of the season. In his last start against the Rangers, he allowed two runs over 5 1/3 innings. In both his starts this year, his fastball velocity averaged a career-low 87.9 mph.