STANFORD, Calif. -- Spencer Jones scored all 18 of his points in the second half for Stanford and played a key role in neutralizing Pac-12 leading scorer and rebounder Azuolas Tubelis, as the Cardinal stunned No. 4 Arizona 88-79 on Saturday night.

Stanford (11-14, 5-9 Pac-12) beat a ranked team for the first time this year and a top-five team for the second time in two seasons. Arizona (22-4, 11-4), hoping to stay a half-game behind UCLA for the conference lead, had a seven-game win snapped.

Courtney Ramey scored a season- and game-high 26 points for Arizona, and surpassed 1,500 career points in the process. Tubelis battled foul trouble throughout the game and was held to four points.

Stanford's Michael O'Connell scored a team-high 22 points, helping the Cardinal outshoot the Wildcats 61% to 46% from the field. Brandon Angel added 14 points for Stanford, Maxime Reynaud had 13 points and Harrison Ingram contributed 12 points and a game-high nine rebounds.

Pelle Larsson and Cedric Henderson Jr. scored 12 points apiece for the Wildcats.

Jones took command of a back-and-forth game a third of the way through the second half, scoring all 13 of Stanford's points during a nearly seven-minute stretch that ended with a layup that gave the Cardinal a 67-66 lead with 7:35 remaining.

A 3-point play by Angel extended Stanford's lead to 70-66 before a Ramey 3-pointer cut the lead to one.

But the Cardinal scored the next nine points, punctuating the run with a wide-open 3-pointer by O'Connell that extended their lead to 79-69 with 3:28 left.

Arizona returns home to host Utah on Thursday in the McKale Center.