[2] Prior to the 2001-02 college football season, Osgood transferred to San Diego State University where he would be named first-team All-Mountain West Conference.

[6] Osgood was signed by the San Diego Chargers as an undrafted free agent ahead of the 2003 NFL season.

[8] Osgood was named to the Pro Bowl in 2007, 2008, and 2010 as the designated special teams player for his conference.

[16][15] He was again re-signed on September 8 when LaMichael James was cut and was released on October 8 to make room for the signing of safety Bubba Ventrone.

[19] Osgood was placed on injured reserve after suffering a broken hand injury during a 17–7 loss to the Seattle Seahawks.