"We had six players in double figures, but that's not all. Guys are rebounding, guys were defending. It feels good and that's kind of our identity," Langston Morris-Walker, who scored 11 points, told the Associated Press.
UC Santa Barbara fell to 5-7.
The Beavers were outrebounded by UC Santa Barbara 30-26, but forced the visitors into 18 turnovers.
"I thought we were extremely casual and careless, 18 turnovers, just did not compete," said Gauchos coach Bob Williams.
UC Santa Barbara, winless in five road games, led by 16 early after a Gabe Vincent 3-pointer made the score 26-10 at the 8:55 mark.
Oregon State responded with a 14-0 run, capped by a Payton steal and a Morris-Walker layup-and-one with 4:31 left in the first half.
"We started defending with a little more purpose, we started attacking the rim instead of settling, and we got great boost from guys off the bench," Tinkle said.
The game turned into a back-and-forth affair for a bit, and the Beavers led 37-36 at the break.
Oregon State began to pull away in the second half. UCSB never truly mounted a serious challenge in the second half and the Beavs often led by five points or more. A Malcolm Duvivier 3-pointer removed all doubt, putting the Beavers ahead 65-54 with 3:43 left.
The Beavers made 8 of 9 free throws down the stretch to seal the win.
Payton, a junior college transfer, entered Tuesday's game leading the Beavers with 12.4 points, 8.6 rebounds and 2.9 steals per game.