FORT WORTH, Texas (AP) — TCU is about to get into what coach Trent Johnson called "big boy basketball" — and that means performances like Sunday's against Mississippi Valley State aren't going to cut it.

Adrick McKinney scored the tiebreaking basket with 34 seconds left and the Horned Frogs held on to beat the winless Delta Devils 67-64 in TCU's final nonconference game before its first Big 12 season begins Saturday night against Texas Tech.

"With the exception of the first five minutes where I thought we did a decent job of executing and playing together, I thought the last 35 minutes weren't very good," Johnson said. "Very disappointing. Mississippi Valley State's energy was a lot better than ours, their ability to get to loose balls, rebound the ball, their ability to play together was a lot better than ours."

Matt Smith's uncontested layup started an 8-3 run for MVSU, and that run ended with Blake Ralling's uncontested layup with 3:43 left that drew the Delta Devils (0-10) even at 60.

Darryl Marshall scored to give MVSU its only lead of the game just over a minute later, but McKinney tied the score with 1:40 left and gave TCU the lead for good with his putback.

After McKinney's go-ahead score, Mississippi Valley State threw the ball away with 10.9 seconds left. Garlon Green made a pair of free throws and Kyan Anderson made another one for TCU (9-4) following Marshall's basket that cut the lead to 66-64. Marshall missed a tying 3-point attempt before the buzzer.

"A lot of times, kids get caught up in looking at a won-loss record . that's not how you play this game," Johnson said. "It's a respect for competition, and you play to the level of how good you are. We didn't do that.

"For us to come in here and think we're just going to roll over them? No. . We're not tough enough to turn it on and off versus anybody."

While the Delta Devils are winless, all 10 of their games have been on the road this season. They open the Southwestern Athletic Conference season at Arkansas-Pine Bluff before finally playing a home game Jan. 6 against Alabama A&M.

MVSU almost got a win on Sunday. But Anderson scored 16 points, Green finished with 15 and McKinney had 13 points and nine rebounds for TCU, which has won three straight. Nine of TCU's 13 games this season have been decided by seven points or less, and the Frogs are 6-3 in those games.

One bright spot for TCU was guard Nate Butler Lind's play on Davon Usher, MVSU's top scorer at 17 points per game. Usher scored just six points on 3-of-10 shooting in 32 minutes. Matt Smith had 17 points to lead the Delta Devils, and Darius Tomlin added 13 points.

TCU never trailed for the first 36 minutes but struggled throughout.

In the first half, Green and Anderson hit back-to-back 3-pointers from the top of the key in a 25-second span to put the Frogs up 23-11. But then Ralling got rolling, hitting consecutive 3-pointers to start the Delta Devils on a 12-4 run to get within 27-23. It was 37-33 TCU at halftime.

The Horned Frogs shot 49.1 percent but was out rebounded in the game 36-34.

"We were very fortunate to win this game, very lucky to win this basketball game," Johnson said. "I cannot look you in the face and say Mississippi Valley State didn't outplay us."