"We did not know this until after the end of the game," Franchione said. "He got a little dinged. We really didn't know that as a staff or trainers. And maybe, I'm not sure even Stephen was completely aware of it until he was telling us about how he felt in the first half after the game."
Franchione said early in the second quarter McGee was slung down, hitting his head on the ground.
McGee, who had two carries in the first quarter, had three straight rushes for 12 yards during A&M's 14-play, 80-yard touchdown drive for a 14-10 lead.
McGee was 3-for-6 passing for 26 yards on that possession.
Concussion or no concussion, McGee was deft at running the option. Several times he made perfect pitches that helped A&M rush for 250 yards.
McGee, however, struggled throwing, even though it appeared A&M receivers were open. He was 9-of-20 passing for 103 yards - 44 coming on the game's final play.
Franchione said the concussion might have been part of the problem, but added that Tech's pass defense is ranked 20th in the country, so he thought it was a combination of things.
Franchione said he expects McGee to play against Kansas this week.
The Missouri-A&M game Oct. 14 could be televised, but that won't be announced until Sunday. The game is on the ready list for ABC (2:30 p.m.) or TBS (6 p.m.).
If neither network shows it, the kickoff will remain at 1 p.m.
Other Big 12 games on the ready list for Oct. 14 include: Baylor at Texas, Iowa State at Oklahoma and Nebraska at Kansas State.
The 11:30 a.m. TV game next week on FSN Regional will be Baylor at Texas or Nebraska at Kansas State. ABC's other choice is Iowa State at Oklahoma. Other choices for TBS are ISU-OU, BU-UT for Nebraska-KSU.
A&M-KU this week will lead off four Big 12 TV games. UT-OU will be on ABC (2:30 p.m.), Missouri-Texas Tech on TBS (6 p.m.), and Nebraska-ISU on ABC (7 p.m.)
It's never a good sign when you're the school's homecoming opponent, which is the case for Texas A&M at Kansas.
Fifth-year Jayhawk coach Mark Mangino has made the last two KU homecomings memorable. Last year, the Jayhawk defense smothered Missouri quarterback Brad Smith, holding the Tigers to a season-low 180 yards in a 13-3 victory in the 114th meeting of the Border Showdown.
Two years ago the KU goal posts came down in a 31-28 victory over Kansas State, ending an 11-game losing streak to its instate rival.
Now comes another challenge for the Jayhawks: they've never beaten Texas or Texas A&M in Big 12 Conference play.
KU on Saturday also will have groundbreaking for its $31 million football complex.
If A&M had won, fans in the South Plains would have questioned the play calling of Tech head coach Mike Leach to start the second half.
A&M, trailing 24-14, ran three plays and punted.
Tech quarterback Graham Harrell passed to Jarrett Hicks for 13 yards to the Tech 46. The Red Raiders then squandered the good field position by running twice, losing 3 yards. A 6-yard completion on third down forced a punt, which helped A&M mount its comeback.
Leach said the Red Raiders "wallowed around" instead of seizing the opportunity.
The 37-yard pass from Harrell to Robert Johnson won the game, but the 11-yard pass to Hicks on fourth down two plays earlier saved the Red Raiders.
Hicks, who wasn't eligible until last week's game against Texas Christian, had five catches for 41 yards.
Harrell was the Big 12's offensive player of the week. He was 32-of-45 passing for 392 yards with four touchdowns. ... Kansas backup quarterback Adam Barmann passed for 405 yards in Saturday's 39-32 overtime loss to Nebraska, but KU coach Mark Mangino said Kerry Meier returns as the starter when his injured shoulder heals. ... A&M's pass defense went from No. 6 in the country (127.5 yards per game) to No. 46 (180.4). In passing efficiency it dropped from fourth to 24th. The rushing offense moved up four spots to 11th (214.8) and the passing offense dropped 10 spots to No. 57 (202.4).