Imagine you're the backup to a person at the top of their game. Like a musician opening for a long-shot who suddenly has the hit of the year. A medical apprentice working with the person who cures cancer. A writer studying under the tutelage of a Pulitzer Prize winner. Imagine that, and then imagine the excitement -- and pressure -- that comes with getting a chance to do it yourself.

That was the life of Colt McCoy at Texas, who created four years of his own legend while always living under the shadow of Vince Young and the 2005 national championship. It was a team for which he red-shirted and witnessed -- at the time -- the best quarterback in college football defy the odds and bring the Longhorns a national title.

But Colt McCoy had some great moments of his own while at Texas. While he never won his team a national championship, he created many memories that will go down in Longhorn lore. Here are 5 favorites.

5. McCoy Breaks 65-yard run against Texas A&M

He might not go down in history considered one of the fastest quarterbacks, but when absolutely necessary, Colt McCoy had some great wheels and Longhorn fans know that the dude could was truly mobile. This was never more apparent than in a 65-yard touchdown run against Texas A&M that felt like it occurred in an instant.

Watch the run here.

4. The Big Bomb to Jordan Shipley

Jordan Shipley and Colt McCoy had one of the closest relationships in all of college football at the time. It seemed at times like they operated as a single unit. This was never more apparent than during a play against Lousiana-Monroe when McCoy connected on a 78-yard bomb to Shipley.

Witness the pass and catch with this clip.

Sure, it was Lousiana-Monroe, but it provided further evidence that McCoy was one of the best in the country in a season in which he was considered a Heisman favorite.

3. The Mustache

Interestingly, one of McCoy's more well known moments while at Texas came off the field, when he sported a wispy mustache during the 2009 summer. I don't know that the 'stache helped him win any games, but just a few years later and you can't shake a stick in Austin without hitting a hipster sporting what should be referred to in these parts as the "McCoy".

2. McCoy Burns Texas Tech Four Times as a Freshman

Grace under fire was a critical motto of the Colt McCoy tenure at Texas. Perhaps never has more been expected of a quarterback coming into his first full college season. But at times in 2006, McCoy shined, including a four-touchdown performance against Texas Tech.

Relive McCoy's game here.

1. An Almost Perfect 2009

If not for a tough hit in the national championship game in 2009, Colt McCoy may have led his Longhorns to a second national title in five years. Nevertheless, his '09 performance is one of the best in Texas history, including a perfect 12-0 record and becoming the most winningest quarterback in NCAA history.