McKinney was one of three players placed on injury lists; as expected, rookies Rodrique Wright (reserve/non-football injury) and Eric Kimble (reserve/PUP) both were shelved for the season.
Among the 14 players cut as the Dolphins got down to 75 players, the only who ever played for the Dolphins was safety Norman LeJeune.
The only other noteworthy player cut was wide receiver Frank Murphy, who really shined in minicamp and was thought to have a shot at making the roster as the fifth or sixth receiver.
The rest of the cuts included players who were given practically no shot at making the team from the start: G Emmanuel Akah, QB Brock Berlin, WR Jamall Broussard, DT Steve Fifita, DT Howard Green, LB Travis Harris, K Ola Kimrin, LB Sam McGrew, P Thomas Olmsted, S Siddeeq Shabazz, CB Art Thomas and WR Jason Willis.
The final wave of cuts, to the final limit of 53, must be done before 6 p.m. on Saturday.