The team opened fall camp Thursday without the former No. 4 overall recruit.
The Tigers have chosen left tackle Elvis Fisher, tight end Michael Egnew, defensive end Jacquies Smith and strong safety Kenji Jackson as this season's senior captains.
The Tigers, which finished 10-3 and No. 18 in 2010, received 266 points in the poll.
High-profile positions vacated by Blaine Gabbert and Aldon Smith are open for new players to fill.
The school will wait until Richardson's eligibility is finalized before he is allowed to practice.
Smith, drafted No. 7 overall after two standout seasons at Missouri, is one of several youngsters getting an extended look while San Francisco examines its options on defense.
It's exactly what the Jacksonville Jaguars expected when they selected the former Missouri quarterback 10th overall in April's NFL draft.
Missouri's Marcus Denmon was named a finalist for the USA Basketball World University Games on Sunday. Kim English, also competing for a roster spot, did not make the cut.
Parking will be free at Memorial Stadium and water will be provided. Fans can receive autographs from 3:45 until 5:15 p.m.
Former Missouri quarterback Blaine Gabbert, the 10th overall pick in April's NFL Draft, signed a four-year contract with Jacksonville worth $12 million.
The pair of senior Tigers guards leave this weekend for the U.S. Olympic Training Center in Colorado Springs, Colo., to take part in a a training camp that will be used to select a team to represent the United States in China.
The Sooners football team got 41-of-43 first-place votes in a preseason poll from media members who cover the league.
Dan Beebe, the Big 12 commissioner, said Tuesday at the Big 12 media days that the conference will have to prove it's "in a solid place going forward."
Missouri football coach Gary Pinkel fielded questions, many regarding sophomore quarterback James Franklin, as a part of Big 12 Media Days on Monday in Dallas.
Big 12 football programs worry how much extra exposure and potential advantage Texas will have when the Longhorn Network debuts next month.
Division titles are no longer part of the landscape for the Tigers in the Big 12 Conference that now has 10 teams and will play a round-robin schedule.
The United States beat rival Japan 6-4 Monday night to win its fifth straight World Cup of Softball championship.
The U.S. will face 2008 Olympic gold medalist Japan on Monday night in a familiar matchup of the sport's two powerhouses.
The Americans bounced back from a loss to Canada earlier in the day to secure a crucial win for their hopes of pursuing a fifth-straight World Cup title.
Missouri tight end Michael Egnew is nominated for the 2011 Allstate AFCA Good Works Team.