Ben Jacobs looks set to miss the rest of the season as the concussion-related issue that has plagued him since last season is yet to be resolved.
Jacobs has seen seven specialists without success thus far according to the Herald Sun, and he is unable to lift his training workload without suffering symptoms such as headaches and facial pains.
His ability to shut down opposing mids has been sorely missed by North this season with the club struggling in the midfield and often letting quality players off the leash.
Jacobs is contracted until the end of 2020 and the club is backing him to recover and get back into the best 22.
With no diagnosis or recovery strategy in place currently, pre-season would look like the ideal place for Jacobs to get back to full fitness.