Looks can be deceiving.
News that the 49ers released Robinson in advance of the 53-man roster deadline could reflect a couple realities. One, the 49ers have a new special-teams coach in Kurt Schottenheimer. Any equity Robinson had built up with the previous special-teams coach, Al Everest, didn't carry over. Two, Robinson wasn't a factor on offense. In fact, when unusual circumstances thrust Robinson into the lineup for the exhibition opener at Indianapolis, Robinson lost a fumble on the team's first offensive play.
A player with no value on offense and no equity with his special-teams coach was more vulnerable than anticipated.