CHICAGO (AP) — 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.”

OAKLAND, Calif. (AP) — Baseball’s new expanded replay rules this season might mean most managers start minding their manners.

That seems to be the case so far, with managers calmly leaving the top dugout step to chat with an umpire to either challenge a play or request that the umpire take a second look via review.

Through Wednesday’s games, in a count by baseball and STATS, there were 64 replays with 21 of those overturned. Nineteen of 48 were on manager challenges, and two were among 16 umpire-initiated reviews.

There could be a missing element for the baseball purists so accustomed to those screaming matches between manager and umpire made famous by by the late Hall of Famer Earl Weaver, retired Braves skipper Bobby Cox or cap-kicking Lou Piniella.

MILWAUKEE (AP) — An umpire’s call has been overturned for the first time under Major League Baseball’s expanded replay system, with Milwaukee Brewers star Ryan Braun ruled out instead of safe.

Atlanta Braves manager Fredi Gonzalez challenged the sixth-inning play at Miller Park on Monday. Braun was originally called safe at first base by umpire Greg Gibson on an infield single.

The call was reversed to out after a review that lasted 58 seconds.

Minutes later, another call on opening day was overturned in Pittsburgh when a Chicago Cubs runner was eventually ruled out at first base on a pickoff.

Earlier in the day, expanded replay was used for the first time in the majors in the Cubs-Pirates game at PNC Park. That umpire’s call at first base was confirmed.

NEW YORK (AP) — Crew chiefs Jeff Kellogg and Larry Vanover head the eight umpires working in Major League Baseball’s replay room for the first eight days of video review.

The league plans to have a pair of four-man crews man the replay room each week at Major League Baseball Advanced Media’s Manhattan office. Brian O’Nora, Dan Bellino and D.J. Reyburn are part of Kellogg’s crew that started its shift Monday night, and Angel Hernandez, Paul Nauert and Adrian Johnson are part of Vanover’s crew.

MLB plans to announce which eight umpires are in the room each week but will not identify which umpire reviews a specific replay.