By Tzvi Machlin It’s been a frustrating offseason for Dallas Cowboys fans in many ways. They’ve seen key contributors from last year’s season walk or get traded with very few elite players replacing them. Unfortunately, the Cowboys may not be able to tie down one of their fan favorites either. Tight end Dalton Schultz is seeking a new contract but doesn’t appear to be getting one anytime soon. According to Michael Gehlken of the Dallas Morning News, Schultz and the Cowboys are “not close” to an extension. Per the report, Schultz may have to wait a while for any new contract. That isn’t to say …