While Robinson was being treated for that unspecified injury, team doctor Wayne Sebastianelli found the athlete had a condition called tight spinal canal, according to PSU spokesman Jeff Nelson.
Nelson said he was told Robinson likely had the problem his whole life but it went undetected until Sebastianelli conducted tests on the area.
Sebastianelli told Robinson any kind of impact to the head could lead to a pinching of the spinal cord, leading to paralysis. At that point, according to Nelson, all agreed it was best for the 6-foot-2, 290-pounder to give up football.
So Robinson walked away from the sport. Which was obviously much better than the alternative.
"This is a big loss for the team," PSU coach Joe Paterno said. "Elijah did very well in our winter conditioning and had been working hard to improve. He had an opportunity to be a big contributor this season. I'm disappointed for him in regard to his football career, but you can't take any chances."
In his first three seasons at Penn State — including a redshirt in 2005 — Robinson shuttled between the defensive and offensive lines. He began the 2006 season on defense but moved to offense after a few weeks, eventually rising to second team on the depth chart at right guard.
When spring practice began this year, Robinson was running first team at left guard.
A crime, law and justice major at Penn State, Robinson, 21, can graduate as early as August, Nelson said.