Seattle Mariners pitcher Hector Santiago was ejected in the fifth inning of Sunday's doubleheader opener against the Chicago White Sox after umpires inspected his glove.

Santiago said he used only rosin on what was a humid day.

"[Umpire Phil Cuzzi] said he felt some sticky stuff on the inside of the glove," he said. "All I used was rosin. I used it on both sides, trying to keep that sweat from dripping down to the hands."

Santiago, 33, was pulled from the game after giving up two walks and two hits in the inning. He was in his third inning of work but was checked for the first time when the confiscation occurred.

Per the league's new rule on inspecting pitchers for foreign substances, Santiago handed his glove over to be inspected by Cuzzi, who ejected him moments later. From replays, it looked as though the umpires were checking the inside of Santiago's glove.

"What we do is we go around the whole glove, feeling for anything that would be sticky or something," crew chief Tom Hallion said. "It was very noticeable, and then the rest of the crew inspected to make sure we were all in agreement. All four agreed that it was a sticky substance, and that's why he was ejected."