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Major League Baseball suspended Diaz for 10 games Monday for violating prohibitions on foreign substances, Jon Heyman of the New York Post reports.
Diaz was ejected from Sunday's 5-2 win over the Cubs after failing the "sticky substance" test from the crew chief upon entering the game in the bottom of the ninth inning. The suspension will go into effect beginning with Tuesday's game against the Yankees, and assuming he elects not to appeal the ban, the 30-year-old closer won't be eligible to pitch until July 6 against the Pirates. Adam Ottavino and Reed Garrett will be the likely candidates to step in for save opportunities during Diaz's absence.