Nobody else has received discipline since the feud began when Machado slid spikes-up into Dustin Pedroia on April 21.
After several games of pitchers from both teams trying to hit batters, Manfred arranged a conference call on Wednesday with Red Sox manager John Farrell and president of baseball operations Dave Dombrowski and their Orioles counterparts, Buck Showalter and Dan Duquette, to urge them to relay a message to their players that enough was enough. Another fan was removed and banned for life from Fenway Park the next day for making a racist remark, and other black players throughout the big leagues said it is a common occurrence to be subjected to such behavior by fans.
The teams will reunite on June 1 at Camden Yards.
Major League Baseball told the O's and Red Sox to cool it.
First pitch is set for 8:10 p.m.
First, let's see how the two teams got here.
"There was at least one pitch that was of grave concern to us, a second one that was of serious concern", Manfred said. Dylan Bundy's fastballs at Mookie Betts' hip may have slipped under the radar.
"It's a little different than a traditional stolen base, so it's really just a circumstantial thing where they said go if they throw at second, and I went", said Smith, who had not stolen a base since May 20, 2014.
Harbaugh, who has thrown his fair share of barbs at the New England Patriots and head coach Bill Belichick, compared the Orioles-Red Sox rivalry to the one that has formed between the Patriots and Ravens.
"Whatever, man", said Sale, who didn't discuss the intention of his pitch. "Wants to go from zero to 100".
Manfred also addressed the issue of racism in ballparks.
"My strong preference consistent with baseball's long tradition is to keep our franchises in the markets where they now play", he said.