During the 1984 season, Giesler played on the best pass-blocking line in the NFL, and Dolphins' coach Don Shula rated Giesler as "his steadiest offensive lineman." In 1986, Giesler missed the first six games of the season after undergoing knee surgery and then injured the knee again late in the season, limiting his playing time to a career-low seven games during the 1986 NFL season. Giesler considered retiring prior to the 1988 season and conducted a two-month holdout before signing a two-year contract with the Dolphins for a reported $657,500.
During the 1984 season, Giesler played on the top pass-blocking line in the NFL, and Dolphins' coach Don Shula regarded Giesler as "his most dependable offensive lineman." In 1986, Giesler missed the first six games of the season after undergoing knee surgery and then injured the knee again late in the season, restricting his playing time to a career-low seven games during the 1986 NFL season. Giesler considered quitting before the 1988 season and conducted a two-month holdout before signing a two-year contract with the Dolphins for a reported $657,500.