The Detroit Lions have bolstered their secondary by signing cornerback Rock Ya-Sin as a free agent. Previously with the San Francisco 49ers, Ya-Sin aims to enhance the depth of a defensive unit that retained four of its five starters. He brings experience from stints with the Colts, Raiders, and Ravens, adding valuable versatility. The Lions have also signed D.J. Reed, and along with other free agent acquisitions like nose tackle Roy Lopez and linebacker Grant Stuard, they are looking to strengthen their defense after a strong 15-2 season that ended in the playoffs against the Washington Commanders.