David D. Glass, who as chief executive of Walmart stores led the world’s largest retailer through one of its greatest periods of expansion, and who also owned the Kansas City Royals when they won the 2015 World Series, died on Jan. 9. He was 84.

His family said the cause was complications associated with pneumonia. They did not say where he died.

Mr. Glass led Walmart from 1988 to 2000; he then became owner and chief executive of the Royals, who, on his watch, made their first trip to the World Series in nearly three decades, losing to the San Francisco Giants in 2014. But the team won the title the next year against the Mets.

Mr. Glass paid $96 million for the franchise in 2000 (the equivalent of about $146 million today) and sold it last fall for $1 billion.