Buckner exits the Colts the same day Quenton Nelson does. It’s a coup for a 49ers defense that has lacked some oomph in one-on-one situations on the defensive line. Buckner, who was with the 49ers early in his career before being traded to the Colts for a first-round pick, will run it back with his original team. The Colts simply weren’t in a position to ask much for the 32-year-old, as they were capped at receiving only a fifth-round compensatory pick for him due to his age. The 49ers are generating a pretty nice playoff-ready defense assuming (as is always the question in San Francisco) it can there healthy.