Tight Ends – As of now, the Patriots have two tight ends -  Rob Gronkowski and DJ Williams  -signed for the 2014 season. Their respective 2014 cap numbers are $5,400,000 and $645,000. Do not expect any changes to their contracts in 2014. Gronk’s 2014 salary and his offseason workout bonus are fully guaranteed. Patriots have until the final day of the 2015 league year to pick up Gronkowski’s $10 million option for the 2016 season. If they do not pick up the option, he will be an unrestricted free agent in 2016 and the Patriots can not franchise him in 2016.

D.J. Williams will be an unrestricted free agent after the 2014 season.

Matthew Mulligan will be an unrestricted free agent at the start of the 2014 League Year. I could see him not returning to the Patriots in 2014 or signing an veteran-minimum deal with the Patriots.

Michael Hoomanawanui will also be an unrestricted free agent at the start of the 2014 League Year. My guess is that Fletcher signs a modest 3-year deal with the Patriots at around $900,000 a year

You can see a screenshot of Gronk’s cap hits here.
Gronkowski’s salary cap page – Rob Gronkowski
Williams’ salary cap page – D.J. Williams