PHILADELPHIA — The overachieving and understaffed 49ers are on to the NFC playoffs’ divisional round, just without George Kittle. After losing Kittle to a first-half Achilles tear, the sixth-seeded 49ers rallied Sunday night to dethrone the defending Super Bowl champion Eagles 23-19 in a back-and-forth, wild-card matchup at Lincoln Financial Field. Brock Purdy, summoning his comeback powers from the NFC playoffs two years ago, delivered a game-winning touchdown pass to Christian McCaffrey with 2:54 remaining. The 49ers’ patchwork defense preserved that lead, allowing the Eagles to reach the 20-yard line before a Keion White sack was followed by three consecutive incompletions...
