Right tackle Adam Grant (78) is a key this year on the UA offensive line, but the junior has had knee injuries the last two seasons.

DAVID SANDERS / arizona daily star 2008

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Two weeks before the season opener, the Air Zona offense is finally starting to take off.

It's about time.

"The defense has been kicking our tail, so it's been good for us to respond the last couple of days," offensive coordinator Sonny Dykes said. "The defense … they were playing harder and more on edge than we were."

The Wildcats' offense came alive in Saturday's scrimmage at Sierra Vista Buena High School, posting 385 yards in 61 plays against an overmatched defense.

Quarterback Willie Tuitama led the way, connecting on 21 of 25 passes for 303 yards and five touchdowns. He averaged nearly 12 yards per completion.

Coach Mike Stoops said he thought Tuitama was "as sharp as he's ever been in camp."

The rest of the offense must catch up. Here are five burning questions as the Cats inch closer to opening night on Aug. 30:

1. Is Nicolas Grigsby ready to lead? The Cats' starting running back initiated a fight during the team's first scrimmage, but rebounded to post solid, unselfish workouts at Fort Huachuca.

Grigsby's on-field production is a given — he averaged 4.6 yards per touch in 2007 as a true freshman — but his reputation off the field is beginning to tarnish. Grigsby must learn to play with passion on the field while keeping his temper in check. If he can do that, the Wildcats will have a leader for the next three years.

2. What will Matt Scott's role be? Normally, a talented freshman like Scott would be a no-brainer for a redshirt year.

But Scott's athletic ability and the Wildcats' lack of speed under center makes him a candidate to play right away in some capacity.

Don't be surprised if coaches use Scott in short-yardage and red-zone situations — the quarterback-lead play is fast becoming his specialty.

3. Can Adam Grant handle the workload at right tackle? The presumptive starter struggled with knee injuries the last two seasons.

If Grant — a 6-foot-6-inch, 308-pound junior — can hold up to the rigors of regular playing time, the Cats will be set at a key position. If not, look for junior college transfers Phil Garcia and James Tretheway to battle for time.

4. Who is wide receiver David Douglas? The freshman from McKinney, Texas, been impressive through the first two weeks of camp and could find himself starting ahead of David Roberts at the small tight end position. Coaches have been impressed with Douglas' soft hands and route-running ability; he had a few impressive catches at Fort Huachuca.

5. Can Terrell Turner keep it up? The 6-foot-2-inch, 190-pound receiver has been one of Tuitama's favorite options throughout camp. He caught four passes for 69 yards and two touchdowns on Saturday, more proof that he's ready to stand out as a junior. Turner had 50 grabs for 575 yards and four touchdowns last season; don't be surprised if those numbers climb in 2008.