['inningNumber | An_inning_earlier', 'pitcherName | 22-year-old_pitcher', 'pitcherName | Martinez', 'strikingType | grounding_out', 'umpireName | Jeff_Nelson']
An inning earlier, Martinez tossed his bat behind his back in the direction of home plate after grounding out, leading umpire West to raise his arms and stare at the 22-year-old pitcher for a few seconds.