Here's a teaser of what I could glean direct from the (outdated as of 2008) PFR database. Here are the best rushing performances against the Chiefs since 1996.
Code:
Year First Last opp rushYD
2005 Tiki Barber kan 220
2003 Clinton Portis kan 218
2006 LaDainian Tomlinson kan 199
2006 LaDainian Tomlinson kan 199
2007 LaDainian Tomlinson kan 177
2004 DeShaun Foster kan 174
2008 Chris Johnson kan 168
2003 Rudi Johnson kan 165
2008 Darren McFadden kan 164
1998 Natrone Means kan 160
2004 Quentin Griffin kan 156
2007 Selvin Young kan 156
2001 Mike Anderson kan 155