New York Mets closer Edwin Diaz's recent 10-game suspension for violating MLB's regulations on foreign substances is not an isolated incident, according to people in the league.
Per USA Today's Bob Nightengale, executives and scouts around the league believe the sticky-substance issue is a widespread problem that teams are finding ways to get around.
"The key is trying to see how they're doing it," one veteran executive told Nightengale. "If umpires started checking infielders' gloves, I think they'd find the answer."
Diaz was set to pitch the ninth inning for the Mets with a 5-2 lead over the Chicago Cubs on June 23, but he was ejected before throwing a pitch after the umpires found a foreign substance when they inspected his hands and glove.