ESPN Men's Basketball

KANSAS CITY, Mo. (AP) -- Jarrius Jackson scored 20 points, six of them on free throws in the final minute, and Texas Tech used a late run to beat Iowa State 64-56 on Friday in the second round of the Big 12 tournament.

The fourth-seeded Red Raiders (19-9) advanced to the semifinals for the fourth straight year and will meet top-seeded Oklahoma on Saturday.

Fifth-seeded Iowa State (18-11) scored just six points after the midpoint of the second half and lost despite a 42-32 rebounding advantage.

Texas Tech trailed by eight with just under 9½ minutes remaining, but then went on a 14-2 run -- capped by Curtis Marshall's dunk with 1:41 left -- for a 56-52 lead.

Curtis Stinson flipped in a layup with 1:29 left, getting the Cyclones within 56-54, but Devonne Giles rebounded Ronald Ross' miss at the other end and hit two free throws with 52.4 seconds left to make it 58-54.

Iowa State turned the ball over on its next three possessions, and Jackson capitalized with a 6-for-6 line performance that iced the win for the Red Raiders.

Giles had nine points and nine rebounds and Ross had eight points in the first half for Texas Tech, which led 34-32 at the break. But for much of the second half, Iowa State's zone defense kept both largely in check.

Giles didn't pick up his first rebound in the second half until 6:13 remained, and didn't score until his basket with 4:40 left cut Iowa State's lead to 50-49.

Ross' first basket of the second half came even later, at the 3:19 mark -- but it was a big one, part of a 3-point play that tied the game at 52.

Giles finished with 13 points and 12 rebounds for Texas Tech. Ross had 11 points, and Martin Zeno added 10.

Stinson led Iowa State with 24 points. Jared Homan fouled out with 14 points and 12 rebounds, and Will Blalock added 12 points.

Both teams hit shooting slumps midway through the second half. The difference was that Texas Tech recovered.

The Red Raiders got within 42-40 on Jackson's basket with just under 12½ minutes remaining, then went scoreless from the field until Jackson hit a 3-pointer with just under 6 minutes to go.

Iowa State built its lead to 50-42 on Stinson's driving layup with 9:25 to go -- and then didn't score again until Stinson hit a jumper with 3:34 left for a 52-49 lead.

The Cyclones, who hit their first four 3-point tries and shot 6-for-15 from long range in Thursday's 77-57 first-round win over Baylor, were 0-for-6 from outside the arc on Friday.

Forward Rahshon Clark, who scored a career-high 20 points against the Bears, fouled out without scoring Friday.