Christian McCaffrey will see specialist in Germany for his Achilles tendinitis NBC Sports49ers’ Brock Purdy Day-to-Day with Back Injury Ahead of Patriots Game in NFL Week 4 Bleacher Report49ers RB Christian McCaffrey seeks help with injury recovery in Germany Niners Wire49ers injuries: Christian McCaffrey seeing specialist in Germany, Brock Purdy day-to-day, star DT out for year CBS SportsWhy Brock Purdy injury is part of larger concern for 49ers ESPN