Can a herniated l-5 with annular tear plus oa in the spine cause pain and spasm in calf muscle in the leg?

Yes: It is certainly possible but there are other causes.

Possibly: If your disc rupture is compressing the S-1 nerve root, just below L-5, referred pain in both calf and foot might be experienced. If this is an underlying progression, your doctor needs to know so that preventative treatment can be started.

Yes: As you describe, either the inflammation of having that tear, or the pinching of a nerve can cause calf pain. Options are: medication, therapy, epidural injections, or surgery.