Yahoo Sports reports: WASHINGTON (AP) — Rookie Colt Emerson homered in a five-run second inning and the Seattle Mariners routed the Washington Nationals 10-2 after a long rain delay Friday night to open a three-game series. Bryce Miller allowed two runs in a career-high eight innings for AL West-leading Seattle, which lost outfielder Randy Arozarena in the third inning to an apparent leg injury while running through first base on a groundout. James Wood hit his 19th homer for Washington (35-35), which slipped back to .500 and fell to an NL-worst 12-21 at home. The game was delayed 2 hours, 11 minutes at the start because of rain. Dominic Canzone opened the scoring with a two-run triple to center in the second, then came around on Miles Mastrobuoni’s sacrifice fly. Jhonny Pereda singled before Emerson ripped Zack Littell’s fastball to deep center . Emerson is the fourth Mariner to hit five home runs before his 21st birthday, joining Ken Griffey Jr. (38), Alex Rodriguez (26) and José López (five). Miller (3-0) allowed Wood’s homer to lead off the fourth and Dylan Crews’ blast to open the eighth , but didn’t permit another runner past first base. He struck out seven while yielding four hits and no walks. Cole Young scored on a wild pitch and Luke Raley hit a two-run single in the fifth for Seattle. Canzone led off the eighth with a homer, and Josh Naylor added a solo shot in the ninth. Littell (6-5) allowed five runs in 1 2/3 innings without recording a strikeout. He threw 43 of his 56 pitches in the second inning. Up next Seattle RHP Luis Castillo (2-5, 5.16 ERA) was set to face RHP Cade Cavalli (3-4, 3.88) on Saturday. ___ AP MLB: https://apnews.com/hub/mlb