Allonzo Trier scored 30 points and No. 3 Arizona overpowered Maryland-Baltimore County for a 103-78 win on Sunday.
DeAndre Ayton added 19 points and 13 rebounds for the Wildcats (2-0), who scored over 100 points for the second time in two games this season.
Arizona pulled away with Trier's 3-pointer, one of five for the junior guard, for an 86-68 lead, then freshman Alex Barcello drilled back-to-back 3s to put the game away.
The Wildcats made 61 percent of their shots for the game and 15 of 28 3s.
Guard Jairus Lyles scored 23 of his 31 points in the first half for the Retrievers (0-2). Jourdan Grant added 14.
Maryland-Baltimore County cut the lead to 58-55 early in the second half on Grant's baseline 3, prompting an Arizona time out. But the Wildcats built their lead back into double digits thanks to a four-minute scoring drought for the Retrievers.
The Wildcats made 21 of 30 first half shots (70 percent). Trier, coming off a career high 32-point night on Friday, scored 15 in the first half.
Still the Wildcats couldn't pull away completely from the Retrievers before halftime, despite making 9 of 14 3-pointers including three from guard Parker Jackson-Cartwright. Lyles made all four of this 3-point attempts, Maryland-Baltimore Country made eight as a team and shot 53 percent from the floor trying to keep up with Arizona's tempo.
Arizona went on 14-0 run early in the half to take an eight-point lead, and went up 34-18 on guard Dylan Smith's 3 at the 9:46 mark. The Wildcats led 56-47 at the break.
UMBC: The Retrievers were the third-most improved Division I team in the nation, going from seven wins in 2015-16 to 21 last season. Their non-conference season includes a showdown with in-state rival Maryland in late December, which will be on national television.
ARIZONA: The Wildcats have one more game at home before embarking on a trip to the Bahamas for the Battle 4 Atlantis tournament, which will be their first big test of the season. Novembers are typically good for Arizona, as the Wildcats are 44-7 in the month under coach Sean Miller.
The Wildcats got two players back from suspension. Forward Keanu Pinder and Smith, who missed Friday's opener due to unspecified team rules violations, came off the bench.
Assistant coach Mark Phelps served the second of a two-game suspension for violating NCAA rules.
Maryland-Baltimore County: Hosts Central Penn College Thursday, the home opener for the Retrievers.
Arizona: Hosts Cal State-Bakersfield Thursday.
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