The University of Missouri has suspended junior quarterback Maty Mauk indefinitely while it investigates a video posted on social media, coach Barry Odom and athletic director Mack Rhoades announced Monday night.
The video shows a person appearing to snort a white, powdery substance. The accompanying tweet mentions Mauk by name, but there was no confirmation from Missouri that the video shows him.
"We are currently gathering information regarding the video in question," Odom and Rhoades said in a statement. "This is an issue we take very seriously and one that will not be tolerated within our program. We will take the appropriate actions once we have all the facts. In the interim, Maty Mauk has been indefinitely suspended [from] the Mizzou football program."
The video, which lasts nine seconds, was posted to Twitter on Monday night, although it is unclear when the footage was recorded and by whom.
A Missouri teammate who asked not to be identified told the St. Louis Post-Dispatch on Tuesday that the video is 2 years old, and that Mauk has since addressed his drug problem.
This is the third suspension since September for Mauk, a onetime Tigers starter. On Nov. 1, former Missouri coach Gary Pinkel suspended Mauk for the rest of the season less than a week after reinstating him from an initial suspension for a violation of team policies.
The Nov. 1 suspension came after Mauk engaged in a dispute outside a Columbia, Missouri, bar.
Odom, who was hired to replace Pinkel in December, quickly reinstated Mauk and authorized him to participate in team activities. Odom said on Dec. 23 that he expected Mauk to compete with freshman Drew Lock to regain his starting job. Missouri was 2-6 in the eight games Mauk missed in 2015.
Mauk has a 17-5 record as Missouri's starter. In the four games he played last season, Mauk guided the Tigers to a 3-1 record and passed for 654 yards with six touchdowns and four interceptions.
Information from The Associated Press was used in this report.