I don't see Johnson winning even 15 games with our current offense minus Konerko.
If we went by some of your logic and signed a free agent starter their is no way we could upgrade anything on offense.
However if we signed a cheaper option at SP, Lowe, Clement, Perez, Lieber, Etc. we still have some money to sign a better outfielder, untility IF, and a setup man.
Then god forbid he gets hurt, any 41 year olds have known to have aches and pains, thats 16 Mil down the toliet.
If we had the cubs or yanks payroll then I would be the first in line to see this deal get down.
But with our payroll it's not worth the gamble.