Crompton looked clearly superior in the final tune-up scrimmage for Saturday's Orange & White Game, completing 17 of 22 passes for 146 yards.
Elsewhere, however, the offensive depth chart is filled with brackets.
Parker also is bracketed No. 1 at left guard, where he started all 14 games last season, with junior Vladimir Richard, who held that position all spring.
Richard also is bracketed No. 1 at right guard with fellow junior Jacques McClendon.
Meanwhile, juniors Austin Rogers and Quintin Hancock are bracketed No. 1 at one of the wideout spots, while senior Josh Briscoe and sophomore Gerald Jones are bracketed No. 1 at another receiver spot.
On defense, the post-spring depth chart shows seven guys holding first-team jobs and eight guys sharing the other four jobs.
The clear-cut first-teamers are junior Wes Brown at left end, junior Dan Williams at right tackle, senior Robert Ayers at right end, senior Ellix Wilson at middle linebacker, junior Rico McCoy at weakside linebacker, junior Demetrice Morley at free safety and sophomore Eric Berry at strong safety.
Bracketed first-teamers are seniors Demonte Bolden and Walter Fisher at left tackle, seniors Nevin McKenzie and Adam Myers-White at strongside linebacker, senior DeAngelo Willingham and junior Marsalous Johnson at left cornerback, sophomores Dennis Rogan and Brent Vinson at right cornerback. Johnson and Vinson were starters in 2007 who missed spring practice with injuries.
Rogan is listed as the No. 1 punt-return specialist. He and fellow sophomore Lennon Creer are the No. 1 kickoff-return men.
With senior Britton Colquitt suspended for the first five games, sophomore Chad Cunningham is the No. 1 punter. Cunningham also is listed No. 1 for kickoffs. Sophomore Daniel Lincoln is again the No. 1 placement specialist. Junior Morgan Cox is the top deep snapper and junior Bram Cannon is the No. 1 holder.