At that stage of the offseason, good players are all gone and only marginal ones remain. James Johnson or Luke Babbitt are maybe the best of the rest for Spurs.
There are some signs that hints towards Spurs not looking to add another SF:
- Spurs have 3 quality SG in Ginobili, Green and Belinelli. They are also looking at De Colo at the SG spot. With all that depth at the SG spot, it's safe to say their plan is to have these players also playing the backup SF minutes.
- After the Kirilenko fail, Spurs haven't really been linked to SFs.
- Spurs have 14 players under guaranteed contract and they are trying to sign Oden or Pittman(my hope) for the 15th spot.
Personally, I think going with Ginobili/Green + Diaw at backup SF will work 99% of the times. However, there are these 1% where not having another true SF will hurt Spurs and only 1 SF is problematic if you start playing small ball.
I expect Spurs to look at that issue again at the trade deadline. Between RC saying in SL there is a hole behind Kawhi and Spurs trying to get Kirilenko, you can conclude that Spurs know they have a weakness in that are and are willing to fix it. It just seems that they are extremely picky on who can fix that. Being picky is kinda smart but risky because Spurs might end up with nobody to fill that hole in their roster.