as of now the Packers 2018 cap space is $21.6m (which assumes a $176m team cap) which . 2017 team cap was $167m.
That's sportrac's number for 48 players under contract for 2018.
Using overthecap's more favorable $26.0 million in cap space for 44 players while assuming a $178 mil cap, I came up with an effective cap space of $13.5 mil here:
https://www.packerforum.com/threads/2018-salary-cap-analysis.77686/
In short, the subtractions were for the first 3 draft picks, filling out the 53 man roster with rookie minimums, filling out the PS, and holding $4 mil in reserve for 8 rookie minimum full season equivalents for PUP and IR replacements.
Somebody else can figure out how sportrac comes up with less cap space, but if you want to use their numbers, the effective cap space is lower than my $13.5 mil.
- sportrac's assumed 2018 cap is $2 million lower than overthecap's
- sportrac has 4 more players under contract, which at the rookie minimum washes with the amount in the above point.
That still leaves sportrac with $4.4 million less than overthecap which means, using my subtractions, yields an effective cap space amount of $9.1 million.
That does not take you very far.