By Frankie Taddeo The Chargers are road favorites against the NFC South-leading Falcons in Week 9. The Chargers head to Atlanta in Week 9 fresh off their bye and aim to keep their perfect 3-0 against the spread (ATS) road record intact against Marcus Mariota and the first-place Falcons. Atlanta extended its home winning streak to three games in Week 8 after beating the Panthers, 37-34, and is with the Cowboys and the Giants for the league’s best ATS mark at 6-2. Bettors and fantasy managers need to monitor the status of both Keenan Allen (hamstring) and Mike Williams (ankle). If one or both st…