A data processing device includes a processor that executes a procedure. The procedure includes, in cases in which display of a player name is included in one or more frames among a group of frames related to a given plate appearance extracted from captured baseball game footage that includes plural frames, identifying the displayed player name as the name of the batter of the given plate appearance; and storing the identified name in a storage device as a batter name corresponding to the group of frames related to the given plate appearance.