A spokesman for the Missouri football team said reserve linebacker Tyler Crane was not in legal trouble but declined to elaborate on the reasons for his departure.
Colorado is still unsure how much it will cost to leave the Big 12 Conference and join the Pac-10.
The University of Oklahoma president said Wednesday that the SEC made an offer to the school as a reaction to the possible breakup of the Big 12.
Big 12 leaders held a board of directors meeting by phone Thursday to move forward with plans for a beefed-up television contract, to reassign some leadership duties and to restore unity. Missouri chancellor Brady Deaton was chosen as the groups' new chairman in the meeting, replacing Texas president Bill Powers for a one-year term.
Texas Rep. Joe Barton, who has introduced anti-BCS legislation in Congress, says the television money that persuaded Big 12 members to reject Pac-10 overtures shows the financial jackpot awaiting a college football playoff.
Texas lawmakers wrote a letter Thursday asking Big 12 officials to consider adding the University of Houston to the conference.
In a press conference on Tuesday, MU leadership reaffirmed the school's committment to the Big 12 and announced expectations for the conference to return on the promise of more lucrative revenues.
Expansion angst passes with assurances that Big 12 Conference will not disband.
Read the live tweets from MU's news conference by Missourian reporter Christie Megura.
MU Chancellor Brady Deaton and Missouri Athletics Director Mike Alden both said they were pleased with the news Monday night out of Austin, Texas.
Shortly after Pac-10 Commissioner Larry Scott said that Texas turned down an offer to join the Pac-10 athletic conference, the Longhorns issued a statement saying it would "continue competing in the Big 12."
The meeting continued the conference realignment discussion that started Friday with Missouri Athletics Director Mike Alden.
The UM system Board of Curators is meeting this week to discuss Missouri's options in conference realignment, among other issues.
Bernadette Gray-Little said she hopes to talk to MU's Brady Deaton as well.
Kansas chancellor Bernadette Gray-Little has reached out to her counterpart at Nebraska, urging him to keep the Cornhuskers in the Big 12 Conference.
Many said there won't be any real answers to the question of conference realignment until presidents of Big 12 Conference schools join the discussions at the Big 12 meetings on Thursday.
No decision by Missouri, Nebraska or anybody else about leaving the Big 12 Conference is expected for several months, but the league commissioner and several others are trying to work out the possibilities in meetings this week in Kansas City.
There are several good reasons why Missouri would be a good candidate for joining the Big Ten if the conference decides to expand.
Big Ten Commissioner Jim Delany took questions on Tuesday at his conference's annual spring meetings in Chicago.
After breaking down the stats on athletic success in the Big 12 and the Big Ten, it is difficult to say if either conference is better.