D'Arnaud joins catcher Erik Kratz as the organization's only representatives on the 24-player roster. Kratz was a late addition as well.
Team USA is currently wrapping up its pre-tournament exhibition schedule. In the team's first exhibition game, Kratz's three-run homer accounted for all the runs in a 3-0 win over Team Canada.
The exhibition schedule wraps up on Tuesday, in advance of the COPABE Pan American Qualifying Tournament. The two-week tournament begins on Oct. 1 in Puerto Rico. Team USA is scheduled to open against Panama.