On Levis he did take a lot of sacks ( 36 ) in a low amount of attempts. He did not run a 40 yard , 10 yard dash , not did he run a 20 yard shuttle or a cone drill at the combine or his pro day. Why? His estimated 40 yard dash time is believed to around 4.7. Now his " sackabilty " could be due to a bad OL, he likes to hold on to the ball too much, is his lack of mobility. It should be viewed negatively unless proven..