LUBBOCK, Texas (Ticker) -- The brother duo of Joey and Stephen Graham came up big in the second half for Oklahoma State.

Joey Graham scored 15 of his 25 points after halftime and Stephen overcame early foul trouble to chip in 13 as No. 6 Oklahoma State rallied for a 76-66 victory over Texas Tech in the Big 12 Conference opener for both teams.

"We are happy to get out of here with a win," Oklahoma State assistant coach James Dickey said. "This is a great win for us. One of our goals is to win the Big 12."

Hampered by numerous turnovers and fouls in the first half, the Cowboys (11-1, 1-0) trailed 36-29 at the half. Starter Daniel Bobik was limited to two points with three fouls and Stephen Graham had four fouls.

In the second half, the Cowboys came out scoring seven of the first nine points, including a 3-pointer by John Lucas to move within 38-36. The Red Raiders responded with a driving layup by Martin Zeno and a three-point play by Devonne Giles off a 3-on-1 break for a 43-36 advantage with 15:23 left.

Joey Graham, who finished with a career-high 12 rebounds, then hit three straight jumpers and Stephen made a layup, a jumper and two free throws to give Oklahoma State its first lead since early in the game at 48-47 with 11:46 remaining.

"It's a matter of letting the game come to you," Joey Graham said about the difference after halftime. "In the second half, I came out and I was more patient."

In all, the Graham brothers scored 18 straight points for the Cowboys for a 54-53 advantage with 9:22 left. Lucas added a 3-pointer and Joey knocked down a shot from the arc to cap a 10-2 run for a 60-53 lead with 8:26 remaining.

"Our job was to execute and we did," Lucas said. "We stayed together and as long as we do we will win this game. Once we went up, in my head, I knew we were going to win."

Oklahoma State, who entered the game fifth in the nation with a 52.3 shooting percentage, turned up its performance after halftime, shooting 63 percent (17-of-27) from the field and committing just two of its 16 turnovers.

"Our guys really responded and we moved better in the second half," Dickey said. "And our defense was a lot better, including our help defense."

Overall, Joey shot 7-of-19 from the field and made all 10 of his free throws. Lucas added 20 points, going 6-of-9 from the arc, and Ivan McFarlin had 14 and 10 rebounds for Oklahoma State, which helped coach Eddie Sutton move within one victory of matching his mentor Henry Iba for seventh place on the all-time career wins list at 767.

"We are supposed to talk to each other," Texas Tech guard Ronald Ross said about Oklahoma State's 8-of-19 3-point shooting. "It was just a lack of communication. They set good screens."

Facing off against Sutton was a fellow member of the 700 wins club, Bob Knight. This was the ninth meeting between the two coaches since both reached the milestone.

Ross scored 22 points and Giles added 20 along with five blocks for Texas Tech (8-4, 0-1), which lost to the Cowboys for the third straight time.

Taking advantage of nine turnovers by the Cowboys in the first 13-plus minutes, the Red Raiders went on a 10-0 run for a 30-17 lead. Ross was the main spark for Texas Tech, scoring 15 points in the opening half on 6-of-6 shooting.