Out of college 40 YD Dash Times:
Betts = 4.60 to 4.62
NFL.com: NFL Draft
USATODAY.com - Ladell Betts, RB - Iowa
Top 10 running backs
Portis = 4.29 to 4.43
NFL.com: NFL Draft
NFL.com - NFL Insider
Top 10 running backs
I know it doesn't mean much since the data is a few years old, but they are the same age and Portis has always been faster. I just thought I'd look it up because I keep hearing that Betts "looks" faster.