Tyler Glasnow was just dropped in my keeper league, so obviously I'm probably going to move to add him, but it might be better to hold off a little bit. My guess on him is that he will at best continue to flail around 5 IP for several more weeks, maybe never really putting it together at all this year, but even still having some bumps in the road after he puts it together.
That doesn't add up to a lot of fantasy usefulness, although obviously the ceiling is extremely tempting.
I'm basically of two minds: try to snag him for a dollar, assuming everyone is pretty down on him, or make sure I get him at $4 or so, and prepare to deal with slight difficulty in continuing to roster him (in the immediate future it isn't so difficult, since I can drop Matt Boyd, but eventually I have Matz and Nola returning, and my other droppables are Derek Norris, Morton, and maybe Cotton. None of those guys are obvious keeps for me over Glasnow, but I think all have higher floors (especially Morton, actually).