BOULDER — New University of Colorado head football coachannounced Thursday morning that he will retain four assistant coaches from the previous Buffalo full-time staff.andwill all return and become members of Dorrell's inaugural Colorado staff. Their exact responsibilities will be determined once the remaining six assistant positions are filled, which Dorrell hopes to conclude sometime early next week. He is currently researching and interviewing candidates while simultaneously meeting with the 97 players on CU's roster."It's always important if you can maintain some continuity during a coaching change," Dorrell said. "I've been around enough college and professional teams where doing so offers some stability. I had great conversations with all four and while I haven't determined their exact roles as of yet, I am excited that we share the same goals and vision for the program. I am excited about all four and am looking forward to working with them."On CU's previous staff under Mel Tucker, Chiaverini was assistant head coach and receivers coach, his fourth year on the CU staff overall, while Hagan was in his fourth year as running backs coach in his second stint as an assistant coach; he also coached the running backs for five years under Dan Hawkins from 2006-10. Both lettered four seasons for the Buffaloes at the same positions they have gone on to coach.Summers and Michalowski were in their first years at Colorado, Summers serving as defensive coordinator and safeties coach and Michalowski tutoring the outside linebackers.Dorrell was named CU's 27th head football coach last Sunday, replacing Tucker, who accepted the head coach position at Michigan State on Feb. 11.