Kubiak concerned about Brian Cushing’s absence

The Texans haven’t seen what Brian Cushing looks like at inside linebacker in their new 3-4 defense. Still recovering from knee surgery on his patella tendon, Cushing hasn’t practiced at all in training camp.  Coach Gary Kubiak spoke optimistically about the recovery of linebacker DeMeco Ryans Tuesday, but sounded a different note about Cushing. “I’m…