He seems to be in the running for the 15th and last roster spot.
In short, when he was active (two years ago), he was a very good perimeter defender who also could drive to the rim and create offense for others. He also was a good three shooter, somewhat better catch-and-shooter than pull-up shooter.
Basically, completely perfect for a backup point guard who could occasionally share the floor with Steph.
The big question of course is how hard the NBA layoff has hit him. He retired to do religious work as a Jehovah’s Witness as he himself described it.
The Lakers actually worked him out two weeks ago, which is a good sign for his motivation to come back, but a bad sign that they haven’t grabbed him already.
Assuming he still has juice left in the battery, in his farewell, he specifically thanked these players:
Victor Oladipo, Russell Westbrook, DeMarcus Cousins, Kevin Durant, Kyrie Irving, Chris Paul, Stephen Curry, Dwyane Wade, and LeBron James
So presumably he would find the Warriors situation beside Steph very attractive.
The CleaningTheGlass.com report
The BBall-Index.com Report
There are a LOT of statistics here. I tried to pull the most relevant ones.