Rob Manfred was elected the 10th commissioner of Major League Baseball on Thursday.
Manfred has been serving as MLB's chief operating officer since September 2013, reporting directly to outgoing commissioner Bud Selig.
"I am tremendously honored by the confidence owners showed in me today," Manfred said. "I have very big shoes to fill."
Manfred's term will begin Jan. 24, 2015.
Manfred started in 1998 working full-time for MLB. Manfred has been instrumental in cleaning up the sport of performance enhancing drugs as well as labor negotiations.
"There is no doubt in my mind he has the temperament, the training, the experience," said Selig, who turned 80 last month and has been in charge since September 1992 when he was among the owners who forced commissioner Fay Vincent's resignation.
After much back and forth all day, Manfred secured the necessary votes to win the job.
Manfred received 22 of 30 votes from owners in the first ballot earlier in the day. With 23 necessary for election, that meant Red Sox part-owner Tom Werner received eight votes. Owners took a break Thursday afternoon but resumed the process later in the day.
On the second ballot, Manfred won unanimously, several owners confirmed to ESPN.com.
Manfred had spent the previous 15 years as MLB's executive vice president of labor relations.
Earlier in the day, MLB vice president Tim Brosnan dropped out of the race to replace Selig.
Brosnan has worked in the commissioner's office since 1991 and has been instrumental in every broadcast contract during the past 10 years.
Werner, 64, previously owned the San Diego Padres. Before then, he was the director of development for ABC. He is a member of the Television Hall of Fame.