[...] the pair will share a locker room in Dallas, faced with the persistent question of who will be the No. 1 goalie for the Stars, if they even have one. General manager Jim Nill doesn't see a problem after signing Niemi, a former Stanley Cup winner, to a three-year contract two days before he was set to become a free agent — and two days after acquiring his rights from San Jose for a seventh-round pick during the NHL draft. [...] the Stars wanted help for Lehtonen after one of his worst seasons statistically, with Dallas missing the playoffs for the sixth time in seven years in large part because of an inconsistent defense. San Jose missed the playoffs for the first time since 2003, and is a year removed from a playoff collapse against Los Angeles that had lingering effects for the franchise. Niemi said the Sharks never made a substantive offer before trading his rights to the Stars. [...] Nill said the Stars entered the offseason with close to $20 million in salary cap space, and wanted to spend money to get Lehtonen some help.