While Tim Tebow's messy mechanics needed tons of work, Brock Osweiler needs more tweaks than anything, and he worked this offseason with Mazzone, who was his offensive coordinator at Arizona State and also served as Tebow's throwing coach.
The Broncos' second-round draft pick took the field at Dove Valley for the first time Friday, participating in the team's 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 he's making plenty of progress in capitalizing on his superior size.
(Copyright 2012 by The Associated Press. All Rights Reserved.)