Gale Sayers ancestors were Exodusters who settled in Kansas. Here's a brief and very interesting story from another descendant of Exodusters who becamse a US District Court Judge. This story appeared in the Topeka Capital- Journal last year. You can find other interesting links about Exodusters on the Web:
http://cjonline.com/news/2011-10-08/...y-baker-family