About a year and a half ago, I posted this batch of data on how teams are built. In it, I looked at where teams' 22 starters come from. But that's sub-optimal, because some starters are more important than others and also because backups have value too.

That post was written in the pre-AV era here at p-f-r. This weekend's draft inspired me to revisit it using the entire roster (weighted by AV) instead of just the starters.

I've broken things down by decade and by team quality (bad = 6 or fewer wins, mediocre = 7--9 wins, good = 10+ wins). The numbers in each category represent the aggregate percentage of the teams' AV that came from that category:

1980 -- 1989, bad teams
==============================
First round picks         23.6
Second round picks        14.9
Third/fourth round picks  19.3
Fifth round and later     28.7
Undrafted                 13.5

Drafted by team           80.5
Acquired via other means  19.5

Age 24 and younger        28.9
Age 25 to 27              37.8
Age 28 to 30              26.2
Age 31 and older           7.2

1980 -- 1989, mediocre teams
==============================
First round picks         25.2
Second round picks        14.7
Third/fourth round picks  18.3
Fifth round and later     28.5
Undrafted                 13.3

Drafted by team           82.1
Acquired via other means  17.9

Age 24 and younger        25.4
Age 25 to 27              37.1
Age 28 to 30              28.4
Age 31 and older           9.1

1980 -- 1989, good teams
==============================
First round picks         24.7
Second round picks        17.1
Third/fourth round picks  18.2
Fifth round and later     27.5
Undrafted                 12.5

Drafted by team           82.7
Acquired via other means  17.3

Age 24 and younger        21.9
Age 25 to 27              37.5
Age 28 to 30              30.2
Age 31 and older          10.4

1990 -- 1999, bad teams
==============================
First round picks         25.4
Second round picks        16.3
Third/fourth round picks  20.1
Fifth round and later     25.3
Undrafted                 13.0

Drafted by team           69.5
Acquired via other means  30.5

Age 24 and younger        25.2
Age 25 to 27              35.4
Age 28 to 30              30.3
Age 31 and older           9.1

1990 -- 1999, mediocre teams
==============================
First round picks         25.9
Second round picks        16.4
Third/fourth round picks  18.7
Fifth round and later     25.4
Undrafted                 13.6

Drafted by team           68.8
Acquired via other means  31.2

Age 24 and younger        19.9
Age 25 to 27              34.8
Age 28 to 30              32.5
Age 31 and older          12.8

1990 -- 1999, good teams
==============================
First round picks         26.6
Second round picks        16.8
Third/fourth round picks  19.0
Fifth round and later     25.0
Undrafted                 12.7

Drafted by team           72.9
Acquired via other means  27.1

Age 24 and younger        17.6
Age 25 to 27              35.0
Age 28 to 30              32.8
Age 31 and older          14.6

2000 -- 2007, bad teams
==============================
First round picks         24.6
Second round picks        18.0
Third/fourth round picks  22.3
Fifth round and later     18.8
Undrafted                 16.2

Drafted by team           68.5
Acquired via other means  31.5

Age 24 and younger        23.4
Age 25 to 27              34.5
Age 28 to 30              30.3
Age 31 and older          11.8

2000 -- 2007, mediocre teams
==============================
First round picks         28.0
Second round picks        18.4
Third/fourth round picks  21.1
Fifth round and later     17.8
Undrafted                 14.7

Drafted by team           68.8
Acquired via other means  31.2

Age 24 and younger        22.9
Age 25 to 27              32.1
Age 28 to 30              33.2
Age 31 and older          11.8

2000 -- 2007, good teams
==============================
First round picks         29.2
Second round picks        16.8
Third/fourth round picks  21.9
Fifth round and later     17.6
Undrafted                 14.5

Drafted by team           72.4
Acquired via other means  27.6

Age 24 and younger        20.4
Age 25 to 27              35.1
Age 28 to 30              32.8
Age 31 and older          11.6