MIAMI GARDENS, FL - JULY 30: Miami Dolphins quarterback Mark Gronowski (16) throws the ball during the Miami Dolphins Training Camp on July 30, 2026, at the Baptist Health Training Complex in Miami Gardens, FL. (Photo by Doug Murray/Icon Sportswire via Getty Images) | Icon Sportswire via Getty ImagesThe Miami Dolphins announced the re-signing of quarterback Mark Gronowski on Sunday, nine days after he had been waived by the team. The return comes a couple of days after Miamis opening preseason game of the year, a 20-7 loss to the Washington Commanders. They also signed linebacker Cam Riley in the moves.To create space under the NFLs roster limit rules, the Dolphins moved offensive lineman Jamaree Salyer to the injured reserve list and waived cornerback Ethan Robinson with an injury designation.Gronowski started his college career at South Dakota State, where he won two Football Championship Subdivision national championships and was named FCSs top offensive player in 2023, winning the Walter Payton Award. He transferred to Iowa for the 2025 season, throwing for 1,751 yards in 13 games with 10 touchdowns and seven interceptions. His 58 combined victories at South Dakota State and Iowa is the most wins ever for a starting quarterback in NCAA history. He signed as an undrafted free agent with the Dolphins in May, then was waived on August 7. The Colts hosted Gronowski for a tryout on Saturday before he returned to South Florida.Riley joins Miami after signing as an undrafted free agent with the New England Patriots in 2025. He spent time with the Tennessee Titans practice squad last year. He began his college career at Auburn in 2020 before finishing with a one-year stint at Florida State in 2024. Salyer signed as a free agent with the Dolphins in March. He has appeared in 64 career games, starting 40 times, splitting time between left tackle and right guard. He was a 2020 sixth-round pick in 2022 coming out of Georgia. The move to IR in training camp essentially ends his season before it began. Robinson joined the Dolphins as an undrafted free agent out of Minnesota last year. He played his first three years of college at Bucknell. As a rookie with Miami, he appeared in two games playing nine special teams snaps. The Dolphins head into Preseason Week 2 with a game against the New York Giants on the schedule. Miami and New York are also scheduled to hold a joint practice on Thursday, a practice that will be open to the public as part of the Dolphins training camp schedule.