Yes, it's a grasshopper. It does appear to have the rear femur at least; it's not clear whether the tibia is missing or just tucked under. Most grasshoppers do have wings as adults.

If he sprang into flight, the legs are long and OK. If he kind of lifted off like a helicopter or had clumsy false starts into flight, the rear legs may have been damaged. Many grasshoppers are cannibalistic and chew on each other.