(AP Photo/Houston Chronicle, Karen Warren, File) Texas A&M quarterback Johnny Manziel (2) stands on the sideline during a NCAA football game in College Station, Texas, in this April 13, 2013, file photo.

HOUSTON - Johnny Football's season will start a little late.

Johnny Manziel was suspended for the first half of Texas A&M's opening game against Rice on Saturday for what the school called an "inadvertent" violation of NCAA rules by signing autographs.

The penalty appears to have brought a quick end to an investigation that could have ruined the seventh-ranked Aggies' upcoming season.

The school issued a statement Wednesday saying it declared the Heisman Trophy winner ineligible and that the NCAA agreed to reinstate Manziel after he sits out the first half against the underdog Owls.

"I am proud of the way both Coach Sumlin and Johnny handled this situation, with integrity and honesty," Texas A&M Chancellor John Sharp said in the statement. "We all take the Aggie Code of Honor very seriously and there is no evidence that either the university or Johnny violated that code."

The quarterback was being investigated by the NCAA for allegedly accepting money for signing autographs for memorabilia brokers, a violation of NCAA rules that could have led to a much longer suspension. ESPN first reported the allegations against Manziel earlier this month.

According to the statement, Texas A&M and the NCAA "confirmed there is no evidence Manziel received money in exchange for autographs based on currently available information and statements by Manziel."

Conditions for reinstatement include Manziel discussing his actions with teammates and A&M revising how it educates student-athletes about signing autographs.