Found this regarding recovery.
To me football involves a lot of explosive movement, therefore I think he's done.
What are the roadblocks to recovering from microfracture surgery?
Although the physical therapy process is rigorous and tempered to your individual knee and surgery, explosive knee movement may take a long time to resurface as a normal activity, especially if you are an athlete. Patience is the most important factor. If you suspect your knee is still not fully recovered, do not attempt explosive knee movements that may injure your knee.