The Oakland Raiders snapped up the quarterback from Louisiana State University in 2007, fresh on the heels of Russell's MVP performance in the Sugar Bowl. But Russell's NFL debut was delayed while his agents hammered out one of the most lucrative (and eventually ludicrous) contracts in NFL history. Russell didn't attend a single day of training camp until he signed his sixyear, $68 million deal.(NFL, nerve fiber layer; RGC, retinal ganglion cells; IPL, inner plexiform layer; INL, inner nuclear layer; OPL, outer plexiform layer; ONL, outer nuclear layer; ML, molecular layer; PK, Purkinje cell layer; GCL, granule cell layer; scale bar 10 m). WT plus psalmotoxin1 (PcTx1) (100 ng/ml) and WT plus amiloride (100 M) tissues were incubated for 18 h at pH 6.5. Representative images for pH 6.5 incubations are shown of crosssectioned optic nerves immunostained for (d) total neurofilament (SMI 31 and SMI 32 antibodies) and for (e) nonphosphorylated neurofilament (SMI 32, which is a marker of i