Roczen to ride the 350 in supercross at Houston.
http://www.supercross.com/news/houston-supercross-we-have-roczen
http://www.racerxonline.com/2011/02/11/10-things-to-watch-for-at-houston
http://www.supercross.com/news/houston-supercross-we-have-roczen
http://www.racerxonline.com/2011/02/11/10-things-to-watch-for-at-houston