Our annual projected, post-spring USF depth chart arrives with a two-word disclaimer.Blake Barnett.This time last year, the Bulls’ 2018 starting quarterback wasn’t even on the roster, which should indicate just how volatile such a list can be. Over the next three-plus months, a degree of attrition will be inevitable, offset by the arrival of transfers.As a result, this chart could hold steady, or disintegrate. At any rate, this is our best stab at USF’s two-deep rotation based on what we observed, heard and surmised this spring.QB Blake Barnett, Gr.RB Jordan Cronkrite, Sr.WR Randall St. Felix, R-So.WR Stanley Clerveaux, R-Sr.WR Johnny Ford, So. (slot)TE Mitch Wilcox, R-Sr.LT Donovan Jennings, So.LG Demetris Harris, R-So.C Brad Cecil, So.RG Billy Atterbury, R-Sr.RT Marcus Norman, R-Sr. Analysis: The Bulls experimented with Atterbury at left tackle and Jennings at right guard for most of the spring, but we see them being moved back to the spots at which they started last season. Based on the protection issues that surfaced during the spring game, we wouldn’t be shocked at even more fluctuation along the line. Look for Jarrett Hopple, a 6-foot-7, 317-pound Virginia Tech transfer, to ultimately contend for a starting job. When the Bulls go two-tight, as they did at the start of the spring game, Berkeley Prep alumnus Jacob Mathis likely becomes the second tight end.DE Kirk Livingstone, R-Sr.DT Kevin Kegler, Jr.DT Kelvin Pinkney, Jr.DE Greg Reaves, R-Sr.LB Dwayne Boyles, So.LB Tony Grier, So.NB Vincent Davis, So.CB Mike Hampton, R-Jr.CB Bentlee Sanders, R-So.SS Nick Roberts, R-So.FS Mekhi LaPointe, R-So. Analysis: Despite the noticeable progress of young linebackers such as Boyles and Grier, this position remains in flux. The long-term status of senior Nico Sawtelle (shoulder) remains unclear, and Oklahoma State graduate transfer Patrick Macon could perform his way onto the first team. Davis, universally known as “Smoke,” has earned the starting nickel corner job and likely slides to safety when the Bulls go to a 4-3. Related: USF spring game: 5 things we learned QB Jordan McCloud, R-Fr.RB Trevon Sands, Sr.WR Jernard Phillips, Jr.WR Zion Roland, So.WR Eddie McDoom, Jr. (slot)TE Jacob Mathis, Jr.LT Jeremiah Stafford, R-So.LG Matt Nelson, R-Jr.C Michael Wiggs, R-Jr.RG Hal Roberson, Sr.RT Jarrett Hopple, Jr.DE Chris Carter, R-Fr.DT Tyrone Barber, So.DT Armon Williams, R-Fr.DE Stacy Kirby, R-Fr.LB Trey Laing, R-Fr.LB Andrew Mims, R-So.NB Bentlee Sanders, R-So.CB Daquan Evans, Fr.CB McArthur Burnett, Jr.SS Keyon Helton, R-Fr.FS Brock Nichols, Jr.