The injury occurred in last year's UTEP game, when he spun behind the line of scrimmage and got hit in the back by a defender. Line is expected to resume workouts with the team in the summer.
Somewhat unexpectedly bursting onto the scene last year, Line rushed for nearly 1500 yards at 6.1 yards per carry. He found the end zone ten times, becoming one of SMU's only consistent starters on offense.
"Second year in a row that I will miss the spring," Line told reporters on Tuesday. "I'm just happy that I found out what was wrong it. It's been hard to sleep because I have been in constant pain. The bone scan just showed that it's not healing as fast. But it will get there."
Line played through the pain in the last four games of the year, receiving treatment on his back each week, but didn't get a bone scan until a few weeks ago.
"They have made me sit for the last two weeks. It's not been fun. I'm going to actually see if I can maybe do something today," said Line.
With 1494 yards last season, Line ranked 11th in the country.