Apparently, the 49ers didn’t dodge every injury bullet during their six-day trip to Maryland. The team on Wednesday placed linebacker and special teams standout Blake Costanzo on injured reserve and signed another inside linebacker with special teams ability, Kion Wilson. Costanzo was injured in Thursday’s game but did not leave the contest. The team did not specify his injury.The 49ers placed special teams standout Blake Costanzo on injured reserve Wednesday.