Year(s) before Jumbo joined the Sharks, he had an infection from his gear. (Another reason the team steam cleans the guys' equipment regularly.)
Minor scratch became major infection. (Google search does not have one easily found article, but he was "injured" during practice January 2003, developed a MRSA infection and required intravenous antibiotics.)
Guessing they wanted to give him some fairly strong stuff to knock down the infection.
MRSA is pretty gnarly