The two exclusive-rights free agents tendered were long-snapper John Denney and fullback Kyle Eckel. Those moves ensure that those two players can't negotiate with anybody other than the Dolphins.
As for Carter and James, the moves weren't exactly surprising, considering their age and salaries. The Dolphins talked to Carter's agent about restructuring his deal, but no agreement could be reached.
Carter was scheduled to make $2.2 million in base salary next season, while James' base salary was to be $3.25 million.
As of Friday afternoon, quarterback Joey Harrington officially remained a member of the Dolphins, which has to be considered somewhat of a surprise or else an indication he has restructured his contract.