Napoli took a called third to end the first inning of Monday night's game against the White Sox, threw his bat down and fired his helmet. The helmet bounced and hit Basner on the leg. The umpire immediately threw out the first baseman.
Manager John Farrell came out to argue, but was not tossed.
Daniel Nava took over at first at the start of the second.
The White Sox lead 4-2.