I'd drop either Webster or Skaggs for him (and I really don't like Morrow).
But I generally try avoid prospect SP. Obviously, that looks dumb at the moment, but I don't ever want to build around them. I'll let somebody else take their initial success and then deal with the adjustment period that will almost always follow. I'd rather be the 2nd or 3rd guy to own the young stud SP, once they've gotten themselves adjusted (and take the reduced value that results from the adjustment period).
That's just me though. Nothing wrong with tossing a Beckett back instead.
10 team 5x5 ROTO (OBP), 11-player keeper, C/1B/2B/3B/SS/MI/CI/IF/5OF/UTIL/8SP/3RP
C: Sal. Perez
1B: Rizzo, Adams, Lind, Carter
2B: Kinsler, Kipnis
3B: M.Cabrera, M. Reynolds, Semien
OF: Stanton, Trumbo, Choo, Marte, Rasmus, Blackmon, Bradley Jr.
SP: Gio, Scherzer, Ryu, Cashner, Kuroda, Lackey, Minor, Wood, Smyly
RP: Balfour, Perkins, Axford, Nathan, Frieri