Mariners' Hector Santiago is first pitcher to be ejected under MLB's new foreign substance protocols

Seattle Mariners pitcher Hector Santiago was ejected from Sunday's game against the Chicago White Sox after umpires checked his glove and discovered a sticky substance on the inside. This is the first ejection since Major League Baseball began cracking down on pitchers' use of foreign substances. 

The 33-year-old left-handed pitcher was replaced midway through the fifth inning after umpires checked his glove — a requirement under the new league rule. The glove was also secured by the umpires before being given to an MLB authenticator for further examination. The Mariners said they believe the examination will clear Santiago, who is facing a potential 10-game suspension. The Mariners would not be allowed to replace him on the roster while he serves the suspension.