Keenan Allen does not appear to have a chip on his shoulder, that accumulation of slights — real or perceived — that many NFL players seem to need for motivation.
The Chargers receiver does have a lump on his shoulder. To the right of his neck is a peculiar-looking protrusion, about an inch high, an inch wide and circular in shape, which looks like a pingpong ball underneath his skin.
“It’s an A/C joint sprain that healed on its own; I didn’t have surgery,” Allen, 25, said of the injury he suffered in December of his rookie year in 2013. “It happened when I dove to the ground to avoid a hit. It hasn’t deterred me in any way.”
Allen can’t say the same for his two...