Michael Weiner is taking over Donald Fehr's role as the head of the baseball player's association. ((Richard Drew/Associated Press))

Michael Weiner has taken over from Donald Fehr as head of the baseball players' association.

Weiner was unanimously approved as executive director by the executive board of the Major League Baseball Players' Association, the union announced Wednesday.

In Weiner's first news conference since the replacement, he said Wednesday that players would like to see the first round of playoffs expand to best-of-seven when their next labor contract starts in 2012.

"There is a lot of sentiment for a seven-game division series," Weiner said.

"I think a properly constructed postseason schedule could accommodate three seven-game series but still have it extend over a shorter period of time than what happened this year."

The first round has been best-of-five since it began in 1995.

Weiner was unanimously approved as executive director of the Major League Baseball Players Association during the annual meeting of its executive board in Scottsdale, AZ.

The 47-year-old Harvard graduate was hired by the union as a staff lawyer in 1988. He was promoted to general counsel in 2004.

The 61-year-old Fehr had been in charge since Dec. 8, 1983, and in June announced his intention to retire by March.

He led players through a two-day strike in 1985, a 32-day lockout in 1990, and a 7 1/2-month strike in 1994-95 that led to the first cancellation of the World Series in 90 years.