Here is video on Watt I ran on my youtube channel leading up that draft. I want you to focus at 0.16 mark. That's burst for big guy. You will never see that from Bosa. I will concede Bosa has freakish hand strength and would be fantastic against run support but at #4 you better have dynamic ability to get to QB.
The very first play of this video... The burst Bosa shows
after already coming out of his stance and then hesitating, is world class. He accelerates so quickly it looks like the video is on fast forward. Then watch 1:01, he's the first off the line, then shows his quickness by jumping inside. He does it again at 1:10--he shows a lightning quick first step, being the first off the line and then the quickness and agility to jump inside. The OT is on skates and he never even touches him.
At 1:43 he absolutely whips the tackle off the LOS and then uses his hands to blow right past him. For someone without a great first step, speed or explosion, he sure does spend a lot of time running right past guys (or not much depending on how you look at it
). His short area explosion and quickness are untouchable. When you combine that with his length and strength, you have the unblockable machine that he was in college.
I think this season, he spent a little more time thinking about how he was going to engage tackles and it shows up in his first step
sometimes. You can see him thinking about it instead of doing it. To me, that shows a player that is evolving and trying to get better in the face of constant double and even triple teams.
Run support my ***. He clearly shows the ability to get to the quarterback and get into the backfield. His film pops off the screen. His career sack total (26) and TFL (51), though they dipped this year, are ridiculous and show he can do it over a long period of time.