Robinson, who started Saturday's 38-7 loss to Temple, entered the game second in the Atlantic Coast Conference in tackles (11.5 per game). He made 13 tackles against the Owls.
Robinson, a sophomore from Atholton, continued to play deep into Saturday's game, and it is uncertain when he was injured. Edsall said Robinson did not want to leave the game.
"We'll be able to get a medical redshirt," Edsall said. "He's the kind of guy I like. The good thing is, we'll still have him for three years. He lays it on the line for Maryland, he lays it on the line for his teammates."
Robinson played in all 13 games last season but started only one. He became a starter this year after former safety Kenny Tate was moved to the strong-side linebacker position known as "Star."
The loss of Robinson will hurt a defense that entered the Temple contest having surrendered more points on average than any other ACC team. Edsall had said his defense had been relying on the safeties to make too many tackles in the defensive backfield.
It's too soon to know who will replace Robinson. Edsall indicated that senior Austin Walker, who has played often on special teams, will be in the mix.
Maryland (1-2, 1-0 ACC) will welcome back Tyler and McCree, who combined for 13 catches in the season-opening win over Miami. After hosting Towson on Saturday, the Terps play three top 25 teams — Georgia Tech, Clemson and Florida State.
Tyler and McCree watched the Temple game from the sidelines wearing warmup pants and gold jerseys. They have been participating in practices.
"I told them, 'You're getting another opportunity. You're getting a second chance.' They will be back in the starting lineup this week," Edsall said.
Tyler and McCree, who are roommates, were suspended after they were out late recently and Tyler allegedly punched a man near a 7-Eleven store off campus. Both missed the past two games.
Edsall said Maryland did not physically match Temple, and that the Terps made mental errors.
There was a blocked punt by Temple, and a roughing-the-kicker penalty on Maryland's Ryan Schlothauer (Eastern Tech) that contributed to an Owls touchdown that made it 28-0.
"We tell the young men you never leave your feet to block the punt," Edsall said. "I should have never called the blocked punt in that situation."
It's hard to find Maryland positives in a game that players called embarrassing. Nick Ferrara averaged 47.2 on six punts. Edsall also singled out senior defensive tackle Maurice Hampton for his five tackles, including two resulting in lost yardage.
Maryland's offense couldn't sustain drives, the defense couldn't stop Temple's running game and special teams committed costly gaffes.
The Terps play Towson (3-0) at 3:30 p.m., on Saturday at Byrd Stadium. The Tigers beat Colgate in their last game, 42-17.