ENGLEWOOD, Colo. Anthony Castonzo Indianapolis Colts . -- Hes a big, raw Denver Broncos quarterback with throwing issues who worked with UCLA offensive co-ordinator Noel Mazzone on his own time to fix flaws. Sound familiar? While Tim Tebows messy mechanics needed tons of work, Brock Osweiler needs more tweaks than anything, and he worked this off-season with Mazzone, who was his offensive co-ordinator at Arizona State and also served as Tebows throwing coach. The Broncos second-round draft pick took the field at Dove Valley for the first time Friday, participating in the teams three-day rookie minicamp. Although his right elbow at times dropped below his shoulder and winged out a bit, the 6-foot-8 quarterback showed hes making plenty of progress in capitalizing on his superior size. Some of his throws were so quick, it looked like he was flicking the ball to his receivers. "This is my first practice with this new throwing motion. I felt very comfortable with it," Osweiler said. "I felt more consistent with my accuracy. Where I was trying to put the ball, for the most part the ball ended up there. So I was very happy with it; now Ive just got to keep building upon that." At times he reverted to his old habits, and quarterbacks coach Adam Gase let him know it. Coach John Fox said Osweilers work with Mazzone is paying off. "I think when we went there to Arizona State for a private workout, you could tell that hed worked on his delivery," Fox said. "It used to be a little bit lower. Guys tweak stuff, whether its golfers with golf swings or you know players with motions and whatnot. Its not radical. He needs to use his height advantage a little bit better with that higher delivery. He was an accurate passer. I think he became more accurate." Osweilers old throwing motion at times negated his height advantage over pass-rushers. "I would say the main thing would be getting my elbow raised up. A lot of times in college, my elbow would drop below my shoulder, and when you do that, you lose velocity, you lose accuracy, youre less consistent with your throws," Osweiler said. "So, we basically made a huge point to bring that elbow up to a more traditional throwing motion and get it above my shoulder." The question facing Osweiler, who threw for 4,036 yards and 26 TDs last season, is whether he can iron things out enough over the next two months to push free agent Caleb Hanie for the No. 2 job behind Peyton Manning this summer. That, and why did he pick jersey No. 6, which was Jay Cutlers old number before his messy divorce with the Broncos three years ago? "Theres absolutely no significance," Osweiler insisted. "Basically, I was told that I couldnt have 17," which belongs to receiver Andre Caldwell, "So, I basically just ... picked a number." Only then did he realize it used to be Cutlers. "But, whatever," Osweiler shrugged. "Its a number and hopefully Ill do some good things with it." Osweiler said it was nice to get this "freshmen orientation" at the rookie minicamp before having to mix it up with veterans. "Its awesome. You think your head might be spinning, and then you look to the receiver next to you, and his heads probably spinning even faster," Osweiler said. "Were all on one ship, were going down this river together." Osweiler was joined by 29 other greenhorns at practice Friday, not counting Fox, who had never run a rookie minicamp as a head coach. "With the way the rules were, I had always combined our rookies and veterans together," Fox said. "So, that not being permitted, this is actually the first rookie camp Ive ever conducted as a head coach, and it was good effort and it went very well." Although Fox prefers to work out rookies and veterans together, hes just glad to have these opportunities after last years lockout wiped out the team-building workouts leading up to training camp. "I think it limited us as a staff -- offence, defence and kicking game -- on the number of things you install just because your time frame for that installation was less a year ago," Fox said. "Shoot, when we reported last year, I had to have name tags on their helmets just so I knew who they were. "I think getting to know guys really helps because you know what buttons to push and you know their personalities. This will give us more time to get to know the players." NOTES: Fox was among a Broncos contingent travelling to San Diego for Junior Seaus memorial service at Qualcomm Stadium. "Its a tragedy losing a guy of that magnitude both as a person and as a player," said Fox, who coached the Chargers secondary from 1992-93. The tragedy also hit home for third-round draft pick Ronnie Hillman, who grew up in La Habra, Calif., and attended San Diego State. "I was driving through Oceanside when I heard" about Seaus suicide last week, said Hillman, who went straight to Seaus restaurant to pay his respects. Authentic Ricky Jean Francois Jersey . Numbers Game examines the deal that sees Martin St. Louis and Ryan Callahan swapping places. The Rangers Get: RW Martin St. Authentic Jerrell Freeman Jersey . Then Ryan Raburn came to the plate and did what he usually does against the Chicago White Sox. Raburn hit a tiebreaking single and David Murphy drove in four runs, leading the Indians to a 12-6 victory over the White Sox.The hype keeps building up for Vaughan, Ontarios Andrew Wiggins, as the Kansas Jayhawks forward is featured on the cover of this weeks ESPN The Magazine. Wiggins, a 6-foot-8, 200-pound forward who plays his first exhibition game on Wednesday against Pitt State, was the top prospect in the class of 2013. Hes also the projected first overall selection in the 2014 NBA Draft, which will air live on TSN next spring. 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