New Delhi, July 3 -- BOSTON - Willson Contreras walked out of the batter's box at Fenway Park on Tuesday night, bat still in his hand, having just swung through Cade Cavalli's final pitch of the fourth inning. Then Cavalli said something. Contreras turned. By the time the benches cleared, umpires had sent three Red Sox and a Nationals pitcher to the showers, and Major League Baseball had an incident it would spend the next two days figuring out how to discipline.

It answered Thursday. MLB suspended Cavalli seven games and Contreras seven. Miles Mikolas, the Nationals starter ejected during the melee, drew five games. Red Sox outfielder Nate Eaton received three. Undisclosed fines accompanied each ban, Yahoo Sports reported. All four play...