BOULDER — Growth, however you define it, isn’t always a straight line. Sometimes, it’s a 62-yard rainbow. Sometimes, it’s recognizing a free play on 3rd-and-11 and cutting loose. Sometimes, it’s trusting your wide receiver to win a 1-on-1 battle with his defender. Sometimes, it’s trusting your pocket is going to give you enough time to throw the ball, and caution, into the mountain wind. “I was able to keep my head up because of the support that my teammates and my coaches have showed me throughout this adversity that we’ve (gone through),” CU quarterback Brendon Lewis said after throwing for a collegiate-best 248 yards and two touchdowns to power the Buffs’ 34-0 stomping of Arizona on Saturday at Folsom Field. “I feel like they’ve really helped me and they’ve all had my back.