Lucas is a longshot to make San Antonio's roster, but since he's not under contract with them, if he plays well and attracts the interest of another team, he's free to sign anywhere or at the very least earn a training camp invite. Two things going for him that the Spurs highly value, though: effective spot-up shooters (to create driving lanes for Tony Parker/Manu Ginobili and post-up opportunities for Tim Duncan) and guards who don't turn the ball over much. If Lucas still does those things well, he'll have a chance of impressing the San Antonio staff, even if it doesn't result in an immediate roster spot.
Lucas played in Europe last season, first in Greece and then in Turkey. He originally signed with Olympiakos in Greece, where he averaged just over 5 points per game for one of the powerhouse teams in Europe. He was released by the club, however, after they signed former NBA guard Acie Law. He then signed with Banvit BK in Turkey, where he averaged 9.6 points and 2.2 assists per game.