The drive took place from 8 a.m. to 2 p.m. today, and was helped by City of Hope, who was on site to facilitate the process - which entails completing a short questionnaire and then giving a swab of cheek cells.
Jesse Marsch, who played with Andy Williams in 2003 and 2004 for the Chicago Fire, was one of many Chivas USA and Galaxy players who were entered today into the National Bone Marrow Registry.
Below is a photo of Marsch finishing his paperwork; click here to listen to his thoughts on Andy, Marcia, and the event.