Judging by Devin Gardner's brand new display picture on facebook it looks like M-Rob is a silent commit. It's JJ, M-Rob, Gardner, and Ricardo all wearing Michigan gear at the Spring game. So based purely on speculation I'm guessing M-Rob is a silent commit.
"Coach Mattison told me what the Ravens were about, what he thought," Beyer said. "He definitely encouraged me. I hold his opinion in high regard."