I'm using these numbers:
http://www.spurstalk.com/forums/showthread.php?t=202685
$22.8M - $7.5M (Splitter cap hold) + $1M (2 roster cap hold remove) => $16.3MSpurs team salary in the 2013 summer:
Tony Parker: $12,500,000
Tim Duncan: $10,361,446
Boris Diaw: $4,702,500
Danny Green: $3,762,500
Nando De Colo: $1,463,000
Kawhi Leonard: $1,887,840
Patrick Mills: $1,133,950
Cory Joseph: $1,120,920
Aron Baynes: $788,872
Roster cap hold: $490,180
Roster cap hold: $490,180
Roster cap hold: $490,180
Total: $39,191,568
In this scenario and with a $62M salary cap, Spurs will have $22.8M in cap space next summer.