"Calf Strain
Grade 1. A mild or partial stretch or tearing of a few muscle fibers. The muscle is tender and painful, but maintains its normal strength. Leg use is not limited, and walking is normal.
Grade 2. A moderate stretch or tearing of more muscle fibers. The muscle is more tender, and there is pain. There is a loss of strength. Sometimes bruising will occur. Leg use is limited and limping when walking is common.
Grade 3. A severe tear of the muscle fibers. This can include a complete muscle tear. Bruising is visible. Sometimes a "dent" is noticeable beneath the skin where the muscle is torn. Leg use is extremely difficult. Putting weight on the leg is very painful.
A "corky" is not diagnosis using a classification system that I know of. It is a phrase commonly used, but it means different things to different people.
If Liam Henry has sore calf, I think it is safe to assume he has strained it. The grading is important in terms of treatment and recovery
