The Nationals are expected to call up Chaparro from Triple-A Rochester ahead of Tuesday's game against the Angels, Andrew Golden of The Washington Post reports.
Washington acquired Chaparro at the trade deadline in a deal that sent relief pitcher Dylan Floro to the Diamondbacks. The 25-year-old infielder will get his first taste of the big leagues after he combined to hit .328 with 23 home runs, 85 RBI, 76 runs and three stolen bases over 105 games with Triple-A Reno and Triple-A Rochester this season. With Jose Tena sustaining a thumb injury Sunday that could force him to the injured list, Chaparro could end up replacing him as the Nationals' primary option at third base in the short term.