Marlon Moore had made just 12 catches in three NFL seasons before joining the 49ers as a free agent this offseason. But when the defending NFC champions played their exhibition opener there was the former Miami Dolphins special teamer lined up with Anquan Boldin as one of two starting wide receivers. The 49ers are thin at receiver thanks to Michael Crabtree's torn Achilles tendon and there are a lot of question marks after Boldin. So when Kyle Williams was ruled out for Thursday's exhibition opener against Denver it was Moore who got the opportunity to run with the starting 11. He played eight snaps and had one catch of a Colin Kaepernick pass for 12 yards. The starting assignment was emblematic of a good training camp as Moore has showed ability as a deep threat for an offense that desperately needs one. He made a nice adjustment to catch an underthrown deep pass from Kaepernick in Monday's practice. "Speed guy. He's a deep threat for this team" rookie safety Eric Reid said. "He's reliable. We can send him downfield and throw him the ball if we need to." Starting on offense was strange for Moore. His special teams play is what kept him on the roster during his first three NFL seasons with Miami. But by earning the start he was kept off special teams for the 49ers.