Gibson, Harris and Thompson all were members of the practice squad last year, while Mitchell spent the entire season injured reserve.
Vick Returns on Practice Squad
All eight players signed to the practice squad were among the final cuts on Saturday.
Dolphins Report Top Stories
Miami Dolphins Draft: Day 2 AnalysisWhat to know about the Miami Dolphins' second round pick Raekwon McMillan and third round pick Cordrea Tankersley.
Dolphins ReportYesterday at 11:25 PM
Miami Dolphins Select Cordrea TankersleyThe Miami Dolphins have selected CB Cordrea Tankersley 97th overall in the 3rd round of the 2017 NFL Draft.
Dolphins ReportYesterday at 8:46 PM
Miami Dolphins Select LB Raekwon McMillanThe Miami Dolphins have selected Raekwon McMillan 54th overall in the 2nd round of the 2017 NFL Draft.
Dolphins ReportYesterday at 6:13 PM
Miami Dolphins Select DE Charles HarrisThe Miami Dolphins have selected Charles Harris 22nd overall in the 1st round of the 2017 NFL Draft.
Dolphins ReportThursday at 7:33 PM