Complex sentence: On November 22,1972, he was signed by the Miami Dolphins to replace and injured Larry Seiple and even though he was placed on the team's taxi squad when Seiple returned, he got a chance to be a part of the Dolphins perfect season.
Split into simpler sentences: On November 22,1972, he was signed by the Miami Dolphins to replace an injured Larry Seiple. Even though he was placed on the team's taxi squad when Seiple returned, he got a chance to be a part of the Dolphins perfect season.