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The 6-foot Keenum knows he has plenty of areas to improve, starting with his mechanics. He needs to learn how to “play taller,” releasing the ball with more loft than he was required to do in college.

“There are so many little things, like patting the ball when I’m about to throw,” Keenum said. “There are a lot of little things that you don’t think about.”

He’s also starting from scratch with the Texans’ complex offense, a different scheme than the pass-heavy offense the Cougars employed. Houston led the nation in passing offense (450 yards per game) and pass attempts (682). The Texans finished second in the league in rushing (153 yards per game) in 2011.

“I don’t know much about their offense at all right now,” he said. “Once I get into it, and figure that out, I’ll probably have a better idea. I’ve got a lot to learn. I’ve got a long way to go.”

And if he needs added incentive, Keenum only has to look across the locker room. Arian Foster went undrafted in 2009 and signed with Houston as a free agent. He’s blossomed into one of the league’s top running backs, making the last two Pro Bowls.

Foster has said that he’s used the draft snub as motivation. Keenum, meanwhile, is just happy the Texans are taking a chance on him.

“I try not to dwell on that right now,” Keenum said. “I’m not looking backward, I’m looking forward. I know that I’m going to be a part of a great organization and one that wanted me, and I wanted to go there. I’m not going to look at that right now.”