Apparently, Niners' eyes were always on McDonald as TE

Daily 49ers blog for NBC Bay Area website: Many thought the 49ers would target Zach Ertz of Stanford as a tight end on draft day, but it turns out Rice's Vance McDonald was the guy they wanted. http://www.nbcbayarea.com/news/sports/New-Tight-End-McDonald-Could-be-Perfect-Fit-for-49ers-205974951.html