Assuming the Rockets have already won:
Spurs: 2nd if they win, 5th if they lose and Memphis loses, 6th if they lose and Memphis wins.
Rockets: 2nd if the Spurs lose, 5th if the Spurs win.
Clippers: 3rd.
Grizzlies: 5th if they win and the Spurs lose, 6th if they lose or the Spurs win.
Spurs: 2nd if they win, 5th if they lose and Memphis loses, 6th if they lose and Memphis wins.
Rockets: 2nd if the Spurs lose, 5th if the Spurs win.
Clippers: 3rd.
Grizzlies: 5th if they win and the Spurs lose, 6th if they lose or the Spurs win.