COLUMBIA, Mo. — Oklahoma State stopped a Missouri offense that had been scoring at will all season, intercepting Chase Daniel three times in the second half and upsetting the third-ranked Tigers 28-23 victory tonight.

Zac Robinson and Damian Davis hooked up on a pair of long scores in the second half, and Patrick Lavine's interception at the Oklahoma State 31 with 1:41 to go was the clincher. Missouri (5-1, 1-1 Big 12) had appeared poised to challenge for No. 1 with a strong effort after top-ranked Oklahoma lost to Texas and No. 2 Alabama had the weekend off.

Instead, it was the coming-out party for the Cowboys (6-0, 2-0 Big 12). Oklahoma State, only 18-19 in coach Mike Gundy's first three seasons, is 6-0 for only the second time since 1945.

And it was Robinson, not Daniel, who played like a Heisman Trophy front-runner. Robinson was 19-for-28 for 215 yards and two touchdowns. Kendall Hunter had 154 yards on 24 carries and a 68-yard scoring run.

Daniel was 39-for-52 for 390 yards and a touchdown for Missouri, which had won 10 in a row and 18 of 19 at home but were held 19 points below their scoring average. Derrick Washington, averaging 100 yards per game, was held to 11 yards on eight carries with a 5-yard scoring run.

The game matched the second- and third-leading scoring teams in the nation, together combining for a 105-point average. From the start it failed to live up to expectations for a shootout, with Missouri held to a field goal on its opening drive after 11 plays and nearly six minutes and Oklahoma State chewing up nearly five minutes before Robinson's 6-yard scoring run on its first drive.

Missouri trailed only once in its previous five games and then only briefly in the opener against Illinois. Oklahoma State grabbed the lead three times to stun a sellout crowd 68,349, going ahead for good on Davis' 40-yard reception for a 21-17 lead late in the third quarter.

Daniel, who entered with 15 touchdown passes and only one interception, pulled Missouri to within five points with 7-yard touchdown pass to Danario Alexander with 4:27 to go. Missouri got the ball at its own 35 after a shanked 10-yard punt with 2:40 to go.

But Daniel forced a throw into tight coverage and Lavine made the diving pick to wrap it up.

Missouri overcame several problems to take a 10-7 halftime lead.

Besides trailing for the second time all season, the Tigers went three-and-out on offense for the first time all year. Plus, their run of scoring a touchdown on their opening drive in every game ended when they stalled inside the 1 and settled for a chip shot field goal by Jeff Wolfert.

Wolfert broke Brad Smith's career scoring record on the opening drive, but missed two other kicks including one that was partially blocked.

Robinson scored on a 6-yard run on Oklahoma State's opening possession for a 7-3 lead. But the Cowboys' Dan Bailey missed a 25-yard field goal attempt early in the second quarter on a kick that may have been tipped.