Houston Texans head coach and general manager Bill O’Brien was fired Monday after a devastating loss to the Minnesota Vikings on Sunday.

The McNair family, which owns the Texans franchise, thanked O’Brien and his family for their contribution to the organization.

“On behalf of my family and our entire organization, I want to sincerely thank Bill O’Brien and his family for their impact on our franchise,” Texans chairman and CEO Cal McNair said in a statement to ESPN. “Bill’s leadership moved our organization forward as he guided us to four AFC South Division championships, 52 wins and multiple playoff appearances during his tenure.”

O’Brien has been with the team for more than six seasons and has led them to win four AFC South division titles.

During a live broadcast, O’Brien praised the McNair family and apologized for falling short and not getting the job done.

“In the end, in this business, it’s a bottom-line business,” O’Brien said. “We weren’t able to get it to where we needed to get it. I understand we fell short in terms of taking this team further in the playoffs. But I do leave knowing that myself and this staff gave everything this organization deserved and more. We worked very, very hard to try to get this to a place where it could be a championship program. We just didn’t get it done.”

Associate head coach Romeo Crennel, 73, will take over as interim head coach. Prior to his role at the Texans, Crennel previously served as head coach in Cleveland and Kansas City before landing joining the Houston team.