So, there's a pretty heavily-injured team in my league that could use some improvements. Of the players he has that I might be somewhat interested in, he has Jonathan Stewart, Sammy Watkins, and Tyler Eifert.

My team is:

QB: Winston, Dalton
RB: Miller, Sims, Gio, Washington, and Morris (but I just put in my #1 waiver claim to grab Ryan Mathews and drop Morris)
WR: Green, Cooks, Hilton, Fitzgerald, Tavon Austin
TE: Barnidge, Allen

He's a newer player. It's his 3rd year playing fantasy, but he's pretty casual about it and doesn't really watch the games much or do anything to form opinions on players other than when he sees his own players do good/bad for him. Not saying I can or will fleece him, but it might be a little easier to give up a little less and get a little more from him. I know one of my other friends in the league offered him Hurns for Watkins.

I recognize the potential for Watkins and Stewart, but I'm not sure if I'm sold on them, plus the worry about their existing injuries. Thoughts on what you guys think would be worth for any of them?