He was projected to become a major contributor for the Wildcats after averaging 10.9 points, 4.9 rebounds and 2.1 assists last season as a freshman.
The Wildcats pulled out tight wins against good teams in both, a sign that they may be back on track.
The Wildcats (6-3) took the lead for good with 1:55 left on a 3-pointer from Parker Jackson-Cartwright and hung on during a tense final two minutes, staying ahead when Texas A&M center Tyler Davis was called for traveling with seven seconds left and Duane Wilson missed the first of three free throws he took with two seconds left. He made two after missing the first attempt, and Dylan Smith made two at the other end to put Arizona up 67-64.
According to oddsmakers at Bovada.lv, Texas A&M is favored in this game, as the Aggies are getting odds of -1.5 points against Arizona.
"We had three turnovers in the second half, I would say that was maybe the biggest reason we won", Miller said.
Texas A&M is off to a 7-0 start to the season including wins over USC, Penn State, Oklahoma State and West Virginia.
Arizona has a respectable 5-3 SU record, but they have difficulty covering the spread (2-6 ATS).
The Wildcats barely escaped the UNLV Runnin' Rebels in their last game, 91-88.
Smith, who hadn't previously scored more than seven points in a game for Arizona, hit 4 of 5 shots in the first half. A handful of those led to transition buckets for Texas A&M and a few were passes simply thrown right to an opposing player.
Texas A&M held up well on a neutral court that wasn't exactly neutral, but couldn't make enough plays down the stretch.
Wilson, who had been fouled by Deandre Ayton just behind the 3-point line, hit the final two free throws but that left UA with a 65-64 lead.
Overall, the Wildcats shot the ball 43 percent from the floor and 32 percent from three, both percentages lower than the Aggies, who shot 46 percent from the floor and 36 percent from three.
That changed in the second half.
It'll be a battle for the ages this evening in the Valley of the Sun, as Arizona welcomes fifth-ranked Texas A&M this evening.
After the teams each failed to score on their next possessions, Texas A&M's D.J. Hogg was fouled by Allonzo Trier with 29 seconds left.
The Wildcats will face Alabama on Saturday in the McKale Center at 8:00 p.m. on ESPN2.