I was just looking back at Tedy Bruschi's stroke. He had his on Feb 16th, was cleared to play Oct 16, and played against the Bills Oct 29, all in 2005. He was 2 years older than this guy, and it looks like almost exactly the same type of deal.
On February 16, 2005, just days after playing in the 2005 Pro Bowl, Bruschi was taken to a hospital with symptoms including temporary numbness, blurred vision, and headaches; Bruschi was diagnosed with a mild stroke. He suffered from a patent foramen ovale, a congenital heart defect that leaves a small hole in the wall separating the left and right atria of the heart. Bruschi suffered from partial paralysis and was admitted to Massachusetts General Hospital. After several months of rehabilitation working with Spaulding Rehabilitation Hospital in Boston, Bruschi announced he would sit out the 2005 NFL season.[5]
With the proper doctors and treatment, almost any time frame seems possible.