Depth is a great thing, that is, until you have to use it.
Virginia Tech's star running back, Darren Evans, tore his ACL in practice today and will miss the rest of the season.
Evans was the lone bright spot for the Hokie offense last year, becoming the first freshman in Virginia Tech history to rush for 1,000 yards.
He finished the season with 1,265 yards on the ground, and was a vital component in the Hokies second straight ACC Championship victory along with their Orange Bowl victory over Cincinnati.
Now that the Hokies have their first big issue of the season, here's what to expect.
The coaching staff was planning on easing in running back Ryan Williams, but now he will be thrust onto the scene against Alabama, much like Tyrod Taylor was against LSU in 2007.
This likely opens the door for freshman running back David Wilson to play this season, although it's not the way the coaching staff wanted to introduce him.
Josh Oglesby is now the most experienced running back, that's healthy, on the Virginia Tech roster. Kenny Lewis went down earlier in summer practice with another injury, and won't see playing time until at least week four.
The Hokies deepest and most touted position now has a dark cloud hovering above it, with many questions and answers to follow.
Williams will likely be the starter, but how will he do?
Is he as a good as he's being played up to be? The good news is, Williams received most of the carries in the spring because Evans and Oglesby were sitting out with injuries.
Now even more pressure will be put on Taylor and Williams to succeed, and the Hokies have time to get Williams acclimated to the starting role.