BRISTOL, Conn. -- The pandemic-delayed Major League Baseball opener was the sport's most-watched regular-season game on any network in nine years.

The New York Yankees' rain-shortened 4-1 win at the Washington Nationals on Thursday night averaged 4 million viewers on ESPN, according to Nielsen fast national ratings. The game peaked at 8:30 p.m. EDT with 4.48 million viewers.

No regular-season game had been viewed by that many since 4.7 million watched Boston beat the Yankees 3-2 in 10 innings on Aug. 7, 2011, also on ESPN.

ESPN's previous high for an opener was 3.7 million for a 2017 matchup between the St. Louis Cardinals and Chicago Cubs. Chicago tied the score with three runs in the ninth, and Randal Grichuk hit a walk-off single off Mike Montgomery in the bottom half.

Seattle's 12-4 victory over Boston on opening night last year was seen by 1.2 million viewers on ESPN.

The Los Angeles Dodgers' 8-1 win over San Francisco in the second game of Thursday's doubleheader averaged 2,764,000 viewers on ESPN. The network said it was its most-watched late-night Eastern time baseball telecast, topping the previous high of 1,817,000 for the Cubs' 3-2 win over the Dodgers on April 10, 2017.