	Two years to the day after his "Little League grand slam" against the New York Mets, on September 8, 2017, Taylor hit a bases-loaded line drive to center field off Philadelphia Phillies pitcher Jake Thompson that a leaping Odubel Herrera was unable to snare. Taylor circled the bases on the play, which was scored an inside-the-park grand slam — the first in Major League Baseball since Aaron Altherr's on September 25, 2015. In the same game, Taylor also singled twice and tripled, driving in a total of five runs, and recorded an outfield assist at home to preserve the Nationals' lead in the eventual 11–10 victory. Taylor finished the regular season batting .271/.320/.486 with 19 home runs, 53 RBIs, and 17 stolen bases in 399 at bats.