Zulgad’s four-and-out: Brian O’Neill takes an important step, T.J. Hockenson’s partial participation, and why free agent visits end without signings

The Vikings began a busy two-week stretch on Sunday in which they will play host to the Tennessee Titans and Arizona Cardinals for joint practices and then preseason games.

Other than an exhibition loss on Thursday in Seattle, the Vikings have spent training camp competing against themselves since it opened in late July.