The initial diagnosis appeared to be a good one for the redshirt freshman -- a sprained right ankle.
Upon further review, however, the damage reportedly turned out to be much more serious. According to a program source, tests conducted when Green returned to the East Coast revealed he sustained broken bones in his right ankle and lower right leg.
He is scheduled to undergo surgery Tuesday morning to assist in the healing of the breaks and is expected to be out of action for up to three months.
That means the 5-foot-10, 194-pounder will likely miss all of spring practice.
The ankle injury is said to be similar to the one that forced Green to miss most of his senior season at JFK High in Bronx, N.Y.
Green carried 95 times for 521 yards during the regular season in 2008, averaging better than 5.5 yards per carry and scoring four touchdowns. He also caught 10 passes for 201 yards and a score.
In the Rose Bowl against the Trojans, he took over for injured starter Evan Royster in the second quarter and pounded out 57 yards on 10 carries. He was also State's leading receiver, with five catches for 67 yards.