Marshall, who finished with 27 carries, scored on a 40-yard run in the first quarter to give Thundering Herd (2-1, 1-0 Conference USA) a 7-0 lead.
But Mark Cann, who threw for 224 yards, threw an 18-yard touchdown pass to Passmore to put Marshall ahead 17-13 with 4 seconds remaining in the third.
Matt Regan, who earlier made a 44 and 22 yard field goals, made another from 25 yards away to cut the lead to one point in the fourth, but Memphis pulled no closer.
South Carolina AD Ray Tanner is not "100 percent sure" Saturday's game vs. No. 7 LSU will be played at Williams-Brice Stadium because of devastating floods that hit the state.
UCLA junior linebacker Myles Jack has withdrawn from school and will enter the NFL draft, making the decision just weeks after suffering a season-ending knee injury.
A judge has lifted a temporary restraining order filed against Rutgers wide receiver Leonte Carroo after a woman he was accused of attacking said she didn't think it was necessary.
Auburn senior receiver D'haquille Williams has been dismissed from the team.
Alabama coach Nick Saban took exception with the media's outlook on his team prior to Saturday's win at Georgia, lashing out at those who "buried" the Crimson Tide.
DraftKings and FanDuel continued to defend their integrity after the disclosure that a DraftKings employee won $350,000 with information used in a way that some have likened to insider trading.