The 49ers have been dealing with injury issues at wide receiver all summer and the list grew this week when Russell Gage sprained his MCL in practice.

The 49ers have added a slew of journeyman wide receivers to replace their remarkable injury-laden position room. Russell Gage was the latest to go down with a knee injury.

The latest wide receiver to go down is Russell Gage, who sprained his MCL during Wednesday's practice and will miss the next 7 to 10 days.

Last week, the Niners added wide receiver Skyy Moore in a trade with the Kansas City Chiefs. The team also has veterans Robbie Chosen and Russell Gage, who suffered a knee injury during practice, but is expected to be good to go by Week 1.

The 5-foot-11, 221-pound Martin had a big hit on Raiders receiver Shedrick Jackson and later blew up a swing pass, but it was a sack and a breakup of a deep pass to tight end Carter Runyon that especially showed his ability to read and attack.