Just filed to ESPN:
Under the plan being swiftly advanced through MLB, umpires will be repeatedly and randomly check pitchers for foreign substances, in a push that could begin within two weeks. Estimates are there could be 8-10 checks per game -- as pitchers depart games.
One of the really interesting details: MLB has essentially built specific foreign-substance scouting reports on pitchers throughout the sport, using video -- some sent in by opposing players. Such as "On his belt, left side." One penalty being discussed: 10 days without pay.
The hope in baseball is that the gentlemen's agreement culture around foreign substances will disappear once umpires start checking pitchers -- and position players -- and that opposing teams will aggressively police each other using video.
The random checks of pitchers could happen as the pitcher leaves the mound from an inning or outing, perhaps reducing the potential impact on pace of play.