Arizona's Allonzo Trier will not play this weekend.

One of the Pac-12's premier players, Arizona's Allonzo Trier, has been ruled ineligible by the NCAA after traces of a banned substance were found during a recent drug screening, 247Sports' Evan Daniels reported Thursday afternoon.

The Wildcats are set to play at Oregon State tonight and then in Eugene on Saturday against the Ducks. Should the suspension stand, the Ducks may have just caught a major break in their hopes of pulling the upset. Trier scored 25 points in Arizona win over the Ducks in January in Tucson.

A dynamic offensive player, Trier ranks second behind teammate Deandre Ayton in the Pac-12 in scoring with 19.6 points per game. He's also among the best in the conference in three-point shooting, making 43.0 percent of his tries.

Along with Ayton and UCLA's Aaron Holiday, Trier is considered a frontrunner for the Pac-12 Player of the Year honor this season.

Daniels did note that Arizona would appeal the ruling.

Arizona is appealing the decision. This stems from a drug screening, which revealed "the reappearance of a trace amount of a banned substance. The amount detected was minuscule by scientific standards..." https://t.co/TTe2q7pK36 — Evan Daniels (@EvanDaniels) February 22, 2018

Trier was suspended for the first 20 games a year ago for a field drug screening. He returned in late January to guide Wildcats to a Pac-12 Tournament championship and a Sweet 16 appearance.

Sign up for the FREE DuckTerritory.com newsletter and get all your Oregon news sent directly to your e-mail inbox daily.

Consider following DuckTerritory on Twitter, as well as our full-time writers Matt Prehm, Erik Skopil and Kevin Wade.

If you're not a VIP subscriber to DuckTerritory.com, consider signing up and taking advantage of our FREE trial here.