With two more hits on Sunday, Diamondbacks first baseman Paul Goldschmidt continued to swing a hot bat in the Cactus League, providing optimism that he can build on the solid, first full season in the majors he compiled last year. The Diamondbacks appear interested in banking on his future. General Manager Kevin Towers on Sunday confirmed he met recently with Goldschmidt’s agent, apparently to discuss whether a long-term deal might make sense for both sides. However, a source said it would be a “surprise” if a deal wound up being consummated anytime soon. “I saw (agent) Joe (Sambito), he was over here in camp the other day, but any contract talks I don’t really want to discuss,” Towers said. “We sat down and talked about a lot of things, but I really don’t want to get into any details.” The club initially broached the subject during the off-season, but Towers said last month that Goldschmidt’s side preferred at the time to wait another year. Though the Diamondbacks haven’t signed any of their homegrown, pre-arbitration-eligible position players to long-term deals since outfielder Justin Upton received a $51.25 million contract in 2010, many clubs aggressively have locked up their young hitters in recent years. Long-term deals with young players usually serve two purposes for clubs: They provide cost certainty and, most important, they often will keep a player locked up for what would have been his first year or two of free agency. As it relates to Goldschmidt, if he were to increase his home-run output, he could become costly in his arbitration years. But there’s no pressing need for the team to work out a deal now; Goldschmidt isn’t on track to become a free agent until after the 2017 season. Not speaking specifically about Goldschmidt, Towers said the rising cost of free agents is likely a big reason why teams are increasingly willing to do such deals. “I think people are probably a little fearful of the free-agent market, where it was and where it might be headed,” Towers said. “Maybe it’s just that a lot of people have good young players that they like, have confidence in and want to tie up. You identify the right player, the right guy, and you want him here for a while.”