Foul strike

(Baseball) a strike by the batsman when any part of his person is outside of the lines of his position.

See also: Foul

References in periodicals archive ?
Willie Newman, the plate umpire, then chased Stanford coach John Rittman for arguing a foul strike that he believed was caught by Cardinal catcher Erin Howe and would have been the second out of the inning.
Claiming that the foul strike rule, as interpreted today, is interfering with good batters of both leagues, George L.
The author fails to note that most of that drop was due to the difference between the two leagues, which amounted to almost a run per game over the course of the season primarily because of different rules concerning foul strikes.