Steelers training camp opened last week in Latrobe, Pa. And new quarterback Russell Wilson barely has registered, as Justin Fields takes the majority of snaps with the first team. Not much changed Wednesday, as the Steelers went through a walk-through practice. Wilson’s calf still is bothering him. It’s the injury he suffered this time a week ago when Wilson pushed a blocking sled as part of a conditioning exercise. Wilson says he and Fields are tight. The two exchange texts. The 35-year-old Wilson also views himself as a mentor to 25-year-old Fields. “Yeah, I think more than anything else, we…