ENGLEWOOD, COLO. (AP) -- Mario Haggan's role this year is part mentor, part tormenter.
The versatile ninth-year pro opened the Broncos' training camp at defensive end as new coach John Fox reinstalled the 4-3 scheme that Josh McDaniels had ditched during his short stint in Denver.
Within a week, though, the Broncos had signed former first-round pick Derrick Harvey to serve as a swing backup defensive end to Robert Ayers and Elvis Dumervil.
That sent Haggan back to linebacker, where he's tutoring rookie Von Miller at his natural strongside position and rookie Nate Irving on the inside.
He plans to get plenty of snaps himself. Playing right inside linebacker in the 3-4 setup, Haggan was Denver's most productive defender last season, setting career highs with 75 tackles and five sacks.
(Copyright ©2011 by The Associated Press. All Rights Reserved.)
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