EUGENE, Ore. (Interstat) — Rashunda Jones scored 23 points and Michigan State weathered a blistering first-quarter offensive display by Oregon to remain unbeaten in Big Ten play with an 85-81 victory over the Ducks on Sunday at Matthew Knight Arena.

The Spartans, who improved to 16-1 overall, trailed by 11 points after a first quarter dominated by Oregon’s Sofia Bell but methodically chipped away at the deficit before seizing control with a decisive third-quarter run.

Bell scored 12 of her 18 points in the opening period, connecting on four 3-pointers as the Ducks (14-4) raced to a 31-20 lead. Oregon shot 70% from the field in the quarter, while Michigan State committed six turnovers.

The game turned in the second quarter as Michigan State’s defense tightened. The Spartans held Oregon to just 12 points on 4-of-14 shooting and forced seven turnovers, closing the half on a 15-2 run to take a 44-43 lead into the break. Jones had eight points in the quarter, and Juliann Woodard hit two critical 3-pointers during the surge.

The most important stretch came early in the third quarter. After Oregon’s Mia Jacobs hit a 3-pointer to tie the game at 50, Michigan State embarked on a 13-3 run. Grace VanSlooten, who finished with 16 points and 10 rebounds, scored six points during the spurt, and Jalyn Brown capped it with a 3-pointer to give the Spartans a 63-53 advantage with 4:14 left in the period. Oregon would not get closer than four points the rest of the way.

Michigan State maintained its lead in the fourth quarter by dominating the offensive glass and capitalizing on Oregon’s mistakes. The Spartans grabbed 15 offensive rebounds, leading to 17 second-chance points, and scored 23 points off 18 Oregon turnovers. Oregon, despite a perfect 12-for-12 performance from the free-throw line, committed five turnovers in the final quarter.

Jones, a guard from South Bend, Indiana, added six rebounds and two assists in 37 minutes, continuing a streak of strong performances for the Spartans. Kennedy Blair contributed 11 points, six rebounds and four assists.

Oregon was led by Katie Fiso, who had 20 points and nine assists, and Jacobs, who also scored 18 points. Bell’s hot start cooled considerably, as she was held to six points after the first quarter.

The Ducks, who entered the game having won six of their last seven, struggled to find consistent offense after the first period. They finished shooting 48.4% from the field but were outrebounded 42-30 by the more physical Spartans.

Michigan State, which entered as a slight 1.5-point favorite, covered the spread. The combined score of 166 points went well over the over/under line of 148.5. The game was part of the Big Ten schedule, with an announced attendance of 6,313.

The Spartans will look to extend their winning streak when they host Nebraska on Thursday. Oregon travels to face Iowa, also on Thursday.