Can peroneal tendon subluxation cause tightness in the soleus? Peroneal tendon on left leg sticks out and area is sore. Soleus tightness in left leg.

Yes. Any ankle problem ( including recurrent peroneal tendon subluxation) that causes pain, swelling and slight limping can make your gastrocsoleus muscle group(calf) 'tight'.Consider seeing an orthopedic specialist to reconstruct your peroneal 'sling '. Best of Luck!