Marcus Mariota suffered a right knee injury during the Commanders' London game against the Colts, with concerns pointing to a possible MCL injury.
https://www.foxnews.com/outkick-sports/marcus-mariota-suffers-knee-injury-colts-london-commanders-lose-starting-qb
https://www.foxnews.com/outkick-sports/marcus-mariota-suffers-knee-injury-colts-london-commanders-lose-starting-qb