No one expected Marlon Moore to be a starting wide receiver for the 49ers when he signed with the team this offseason.The fourth-year pro from Fresno State is listed as a wide receiver on the roster, but during his first three NFL seasons with the Miami Dolphins his work primarily was on special teams. It was that ability the 49ers were looking at when they signed him to beef up their special-teams play in 2013.Yet because of injuries to others, his speed and his performance in training camp this summer, Moore – who had just 12 catches in three seasons with the Dolphins – found himself as a wideout in the starting lineup last week opposite Anquan Boldin when San Francisco opened its exhibition season against the Denver Broncos.Moore played just eight snaps in the game, departing with the starting unit early in the first quarter. But in that time he made a catch of a Colin Kaepernick pass for 12 yards and did the things the 49ers coaching staff and his teammates have noticed since he joined the team. He's been reliable, shown good hands and been able to use his speed – among the best in the team's receiving corps – to spread the field.Niners rookie safety...