The Dallas Mavericks' point guard priorities are now shifting to 39-year-old and former Mav Steve Nash and one-time Mavs Summer League hand Jeremy Lin, sources told ESPN.com's Marc Stein.Sources say the Mavs will pursue Nash and the New York Knicks' Lin, who is a restricted free agent. As such, the Knicks can match any offer made to Lin.The Los Angeles Lakers have also taken an interest in Nash, according to an NBA.com report.Dallas is undecided regarding Houston Rockets free agent Goran Dragic, who visited the Phoenix Suns on Tuesday and could command a starting salary of $10 million, according to sources. Source: ESPN