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Posted by ESPN.com's Tim Griffin
Several media sources indicate that Colorado secondary coach Greg Brown has become the second Big 12 assistant in less than a week to be offered the vacant defensive coordinator position at South Florida.
Brown, 50, has been a member of coach Dan Hawkins' staff with the Buffaloes for three seasons. Earlier, he coached 15 years in the NFL and was a member of Bill McCartney's Colorado staff from 1991-93.
The Buffaloes led the Big 12 in pass defense last season, but still struggled defensively in a disappointing 5-7 season that saw them lose seven of their final nine games after starting 3-0.
The vacancy at South Florida was created when Iowa State hired veteran former USF coordinator Wally Burnham to become defensive coordinator on Paul Rhoads' staff.
USF coach Jim Leavitt had offered the defensive coordinator position to Illinois co-defensive coordinator Dan Disch and Nebraska linebackers coach Mike Ekeler. Both declined the opportunity.
Hawkins earlier lost two members of his staff and has one other current coaching vacancy. Offensive line coach Jeff Grimes quit the Buffaloes' coaching unit to join Gene Chizik's staff at Auburn. And Mark Nolan, Colorado's on-campus recruiting coordinator, left to become a head coach at Regis (Colo.) High School.
Former Illinois State head coach Denver Johnson was hired to replace Grimes, but Nolan's position remains vacant.