Further Breakdown:
 
SEATTLE:
2008: YDS/G: 378.0 (30TH), PASS/G 259.3 (32ND), RUSH/G 118.7 (18TH), PTS/G 24.5 (25TH)

BRADLEY

2009: YDS/G: 356.4 (24TH), PASS/G 245.4 (30TH), RUSH/G 110.7 (15TH), PTS/G 24.4 (25TH)

BRADLEY+CAROL

2010: YDS/G: 371.8 (27TH), PASS/G 249.6 (27TH), RUSH/G 118.9 (21ST), PTS/G 25.4 (25TH)

2011: YDS/G: 332.2  (9TH), PASS/G 219.9 (11TH), RUSH/G 112.3 (15ST), PTS/G 19.7 (7TH)

2012: YDS/G: 306.2  (4TH), PASS/G 203.1  (6TH), RUSH/G 103.1 (10TH), PTS/G 15.3 (1ST)

CAROL

2013: YDS/G: 273.6  (1st), PASS/G 172.0  (1st), RUSH/G 101.6  (7TH), PTS/G 14.4 (1ST)

 
JAX:

<div>2012: YDS/G: 380.5 (30TH), PASS/G 239.5 (22ND), RUSH/G 141.0 (30TH), PTS/G 27.8 (29TH)

BRADLEY
2013: YDS/G: 379.4 (27TH), PASS/G 247.6 (25th), RUSH/G 131.8 (29TH), PTS/G 28.1 (28TH)

2014: YDS/G: 451.3 (32ND), PASS/G 320.8 (32ND), RUSH/G 130.5 (25TH), PTS/G 38.0 (32ND)

</div>
 
What I gather:
1. From the time Bradley arrived in Seattle it took 2 full bad seasons before the defense got good.  
2. The defense took a jump from bad to good from one season to the other
3. Jacksonville was significantly worse off than Seattle was upon his arrival.  I'm not sure what the Seattle roster situation was at the time, but Jacksonville was completely gutted when he got there on top of already being bad.
4. The defense is historically bad so far this year.  Sheesh. 38 PTS?  451 yards???
5. If we factor everything together, and are basing it off his time in Seattle, I'd say 2016 would be the year to actually expect a good defense (if it happens at all)

---