I believe Sobomehin is on the injured reserve list now for New Orleans.
Olaniyi Sobomehin Signed to Active Roster
http://www.neworleanssaints.com/Articles/2008/9/Sobomehin%20Signed%20to%20Active%20Roster.aspx
Sunday, September 28, 2008 - 10:30 AM
New Orleans Saints Executive Vice President/General Manager Mickey Loomis announced Sunday that the club has signed fullback Olaniyi Sobomehin to the active roster and terminated the contract of tight end Sean Ryan.
Sobomehin is a rookie running back that signed with the Saints as a free agent out of Portland State University in the days following the NFL draft in April. The 6-1, 230-pound fullback played in all four of the team’s preseason games in August, catching one pass for five yards. He was waived in the team’s final round of roster cuts and subsequently re-signed to the practice squad prior to the regular season opener.
http://www.neworleanssaints.com/Team/Injured%20Reserve/People/Olaniyi%20Sobomehin.aspx
Signed, 5/8/08…Athletic runner who has the ability to play fullback or tailback, he played in 19 games for Portland State over two seasons with eight starts after transferring to his hometown school…Spent three years at Oregon State, a redshirt year and two seasons as a contributor on special teams…Was PSU’s leading rusher in his senior season, gaining 515 yards on 110 carries with eight touchdowns…Also caught 40 passes for 377 yards and three more scores…Was named second-team All-Big Sky Conference…Was a political science major…Lettered in football, basketball and track at Cleveland (Portland, Ore.) HS, where he was the team MVP in football and basketball…Name is pronounced OH-la-nee-yee Shuh-BO-muh-heen, but is known by the nickname “Nee”…Born Oct. 11, 1984 in Portland, Ore.