Seven no-hitters have been pitched in franchise history, four while the team was based in Montreal as the Expos, and three as the present-day Washington Nationals.
[2] Dennis Martínez threw the first and thus far only perfect game, a special subcategory of no-hitter, in Expos/Nationals franchise history on July 28, 1991, during the Expos era.
The task of the umpire in a baseball game is to make any decision "which involves judgment, such as, but not limited to, whether a batted ball is fair or foul, whether a pitch is a strike or a ball, or whether a runner is safe or out… [the umpire's judgment on such matters] is final.
"[4] Part of the duties of the umpire making calls at home plate includes defining the strike zone, which "is defined as that area over homeplate (sic) the upper limit of which is a horizontal line at the midpoint between the top of the shoulders and the top of the uniform pants, and the lower level is a line at the hollow beneath the kneecap.
The tasks of the manager include determining the starting rotation as well as batting order and defensive lineup every game.