Updated

Baseball Commissioner Bud Selig says the sport's playing rules committee is working to clarify the rule on transfers by fielders on forceouts, which has caused some controversy in the first season of expanded instant replay for umpires.

Attending a game at Wrigley Field on Wednesday marking the 100th anniversary of the ballpark, Selig said he has not spoken with committee chairman Sandy Alderson, the New York Mets general manager.

Selig expects to hear back about clarifying the rule, adding "given the fact it's new, yes, we've had a little glitch here and there, but not much, and nothing that really affected a game," Selig added.

With instant replay, there has been increased scrutiny on when fielders have control of throws as they step on bases for forceouts and then transfer the ball to their hands for throws in attempts to turn double plays.

"I think it's done great," Selig said. "I don't think it's been a can of worms at all. In fact, I think for something new, it's been unbelievably good."