I believe the actual stat is 29 times or fewer. Loss to NE game #1 he was 23 for 30, in W over Miami he was 21 for 29.
200 yard rushers in a Loss.
http://www.pro-football-reference.com/blog/?p=4042
Going back to 1978, and not including 2009, a team has rushed for 200 or more yards on 1,110 occasions. 135 of those teams lost the game. So, the short answer is, about 12.2% of the time.
http://iqfb.com/league-facts/rushing-for-200-yards-and-still-losing-the-game/
this is the game I remember
2002 – Ricky Williams – Miami Dolphins
Ricky Williams carried the ball 27 times for 228 yards and two touchdowns in a 38-21 loss to the Buffalo Bills.