Georgia Tech safety Isaiah Johnson did not practice Wednesday, increasing the likelihood that he will not play in Saturday’s game vs. Tulane. Coach Paul Johnson said the senior, who has started 30 career games for the Yellow Jackets, will be a game-time decision. Defensive tackle Adam Gotsis did return to practice and will play.

Johnson did not finish Tech’s 38-19 win over Wofford Saturday with an unspecified injury and missed the first three practices of the week, as the Jackets prepare for their first road trip of the season. Gotsis’ injury is also unspecified.

“I never doubted he was going to play,” Johnson said of Gotsis.

Defensive coordinator Ted Roof was unsure Tuesday about who would replace Johnson in the starting lineup. Roof could move Demond Smith, who started 10 games at safety last season and is the starting nickel back, to safety and start Domonique Noble or Lance Austin at nickel.

Paul Johnson also said linebackers Anthony Harrell, who is returning from a season-ending knee injury suffered last October, and Tyler Marcordes, who was sidelined in the preseason with a leg injury, practiced this week and will both “play a lot.” Marcordes played in a limited role against Wofford.