The Lakers have previously said they're unlikely to use their mid-level exception, and considering Barbosa's remaining ability, there's not a lot of reason to think the Lakers can land the speedster, but it would be a big pickup.
There's a lingering thought that the Lakers need a shooter to complete the roster, and Barbosa is good enough from the perimeter and can bring some offense management as well. He's good friends with Steve Nash from his days in Phoenix, and would fit well with the other players on the Lakers. Maybe most notably, he'd add speed off the bench with veteran experience.
But again, it's tough to see him going for the amount of money that the Lakers can offer.
Barbosa is curently in London with the Brazilian national team who barely edged host nation Great Britain 79-78 on Thursday.