Third baseman Brady House was promoted by the Washington Nationals from Triple-A Rochester and made his major league debut on Monday night, the club’s latest rookie to get a look at the big league level this season. House went 0 for 3 with a strikeout and a walk in a 6-4 loss to the Colorado Rockies — the ninth straight setback for the Nationals, who fell to 30-42. House, selected 11th overall in the 2021 amateur draft, made solid contact with a runner on first in the ninth inning, but hit the ball right at Rockies second baseman Orlando Arcia, resulting in a double play.