Giuseppe Rossi , should i release him ?

hi ,

i made a mistake and i signed Rossi for free while he was injured
he needed 3 months to come back and after he back he injured again in training !
he will be out for 9 to 10 months !!!

now should i release him on a free
or just keep him ?
if i release him i will pay him 875k as a compensations
now he sees a specialist for his injure , does it cost more then the compensations i have to pay him ?