Rielly last played in Sunday's 2-1 loss to the Carolina Hurricanes on the 24th of March. However, the injury didn't take place during the loss, in fact, it happened shortly before they were set to face off against the New Jersey Devils in their following game.
And according to David Alter, it seems like he's still holding onto that expectation, despite not being in the lineup for tonight's divisional clash against the Buffalo Sabres. Keefe stated on Friday that Rielly is "progressing well, looks like he's turned the corner here". Whether that means he'll have the green light to play in Monday's game against the Panthers is unknown, but he's not far off now.