Assuming there is still continuity of the axon (i.e., that it hasn’t been severed, or split apart in the middle), it takes approximately 1 month to regenerate each inch of damaged nerve. If everyone could please get out their abacus… the fact that Manning had his surgery 4 months ago and that the impacted nerves have apparently not yet regenerated fully implies that there were… drop the 4… carry the 2… at least 4 full inches of nerve to repair. However, this is inconsistent with sports medicine expert Dr. Sheeraz Qureshi’s expectation (from afar) that Manning could start physical therapy and strength training 4-5 weeks after the procedure. It is also inconsistent with Jim Irsay’s confidence at the time that Manning would need only 8 weeks to recover – including rehab – and would be at training camp. Based on his comments, it appears that Qureshi assumed that there had been little to no nerve damage. And while Qureshi did not examine Manning personally, Irsay was also confident, implying that Dr. Richard Fessler (the neurosurgeon who did perform the procedure) gave him no information to feel otherwise. Yet here we sit, 4 months later, with Manning still on the Physically Unable to Perform list, a new (old) backup quarterback signed, and continued comments about the need for Manning’s nerves to regenerate. A possibility that I hate to have to explore, but which we may have to soon, is that there was enough nerve damage that complete regeneration will not be possible, or that Manning’s system – despite his long-standing status as a model of health – is simply incapable of doing so.