According to Adam Caplan's Twitter account, he has been told that the Dolphins have waived rookie tight end John Nalbone.
It's uncertain who was brought in to replace Nalbone, but one possibility is that the team activated LB Matt Roth from the NFI list.
I was pretty high on Nalbone coming out of college, albeit a little surprised that Miami took him in the fifth round. I would hope that he clears waivers and finds his way back on Miami's practice squad, but he may get claimed by another team.
Nalbone's ceiling is high (I believe he can be a future starter) and it's no surprise that he required a lot of development time. It would be disappointing to see Miami give up on him so soon and essentially waste a fifth-round pick.
Anthony Fasano and Joey Haynos are now the only tight ends left on the roster. TE Kory Sperry is on the practice squad.