I assume that like most fans you are functionally ignorant of probability and statistics, which makes this kind of discussion difficult to the point of futility. Probability and Statistics is
not intuitive, which is why so many of us struggle with it. We are actually all too good at pattern matching, and can't easily tell when we're actually seeing pictures in the clouds of data versus when we are imagining patterns that aren't there.
There are two big problems the many fans like you who agree with your claim of a 2nd round pattern have:
First, you don't have any idea of what good performance in drafting actually is. That's sort of the whole point the OP of this thread.
Second, you make no allowance for luck, and indulge in the sin of cherry picking while you're at it.
Let me use as baseball analogy because fans have a much better history of interaction with statistical anomalies with that sport.
Let's say a batter new to baseball is up 10 times and gets 4 hits. What can you conclude about his (or her) performance? A completely ignorant fan might say, "that's terrible, he fails to get a hit 6 times out of 10!". That's the first point, you need to know how to measure performance and you can't say anything intelligent without addressing that. So what is the standard to address draft pick performance?
The second and even more important point is about sample size. Everyone knows you can't judge a baseball player hitting performance by using only 10 at bats, because we've all seen how streaky baseball performance can be. So why do you think 9 draft picks allows you to judge BB's performance versus a performance standard you can't even articulate? How do you know you're not seeing patterns in clouds?
Your obviously aware that you are cherry picking by downgrading Chung (a 10 year starter) and preemptively scorning Dugger. But the more important cherry picking mistake you and your brethren are making is excluding all the other DB draft picks BB has been responsible for. You need as many "at bats" as you can get! That's why excluding UDFA success is also a mistake, because it hides more samples of possibly demonstrated skill at picking and developing DB's.
Tracking UDFA history is hard so I haven't done it, but I have pulled BB's entire Patriots DB draft history for your bemusement:
| Year | Rnd | Player | Pick |
| 2022 | 3 | Marcus Jones | 85 |
| 2022 | 4 | Jack Jones | 121 |
| 2021 | 6 | Joshuah Bledsoe | 188 |
| 2020 | 2 | Kyle Dugger | 37 |
| 2019 | 2 | Joejuan Williams | 45 |
| 2019 | 7 | Ken Webster | 252 |
| 2018 | 2 | Duke Dawson | 56 |
| 2018 | 7 | Keion Crossen | 243 |
| 2016 | 2 | Cyrus Jones | 60 |
| 2015 | 7 | Darryl Roberts | 247 |
| 2015 | 2 | Jordan Richards | 64 |
| 2014 | 6 | Jemea Thomas | 206 |
| 2013 | 3 | Logan Ryan | 83 |
| 2013 | 3 | Duron Harmon | 91 |
| 2012 | 2 | Tavon Wilson | 48 |
| 2012 | 6 | Nate Ebner | 197 |
| 2012 | 7 | Alfonzo Dennard | 224 |
| 2011 | 2 | Ras-I Dowling | 33 |
| 2011 | 7 | Malcolm Williams | 219 |
| 2010 | 1 | Devin McCourty | 27 |
| 2009 | 2 | Patrick Chung | 34 |
| 2009 | 2 | Darius Butler | 41 |
| 2008 | 2 | Terrence Wheatley | 62 |
| 2008 | 4 | Jonathan Wilhite | 129 |
| 2007 | 1 | Brandon Meriweather | 24 |
| 2007 | 6 | Mike Richardson | 202 |
| 2006 | 7 | Willie Andrews | 229 |
| 2005 | 3 | Ellis Hobbs | 84 |
| 2005 | 4 | James Sanders | 133 |
| 2004 | 3 | Guss Scott | 95 |
| 2004 | 4 | Dexter Reid | 113 |
| 2004 | 7 | Christian Morton | 233 |
| 2003 | 2 | Eugene Wilson | 36 |
| 2003 | 4 | Asante Samuel | 120 |
| 2001 | 3 | Brock Williams | 86 |
| 2001 | 6 | Leonard Myers | 200 |
| 2000 | 6 | Antwan Harris | 187 |
I'll let you all to opine as to whether that is a good or bad history. It includes 1 first team all-pro year, 8 pro-bowl years, and 64 player years of primary starter for the Pats.
Stats thanks to
New England Patriots All-Time Draft History | Pro-Football-Reference.com