Doc Rivers just interviewed on WEEI, and he maintained optimism regarding Kevin Garnett’s non-knee injury.

“I can’t tell you much more than what you know already,” Rivers said. “He’s going to do more tests today. We do think it’s muscle-related. We don’t think it has anything to do with the knee, but we don’t know. So we’re going to wait and see.”

Rivers added, “I think we’re in good shape here, but you just never know. I’m just going to wait for the MRI. I should know by mid-afternoon.”

This is how on-edge I am — I hear, “We don’t think it has anything to do with the knee, but we don’t know,” and all I hear is , “But we don’t know.”

Still, the Celtics are almost positive it’s a muscle, rather than the knee or a ligament/tendon. Why? Because KG’s stability tested out well. (Boston Herald)

“The doctor checked the knee joint stability, lateral and all that, and that came away good,” Twiss said. “So that’s good.”

The MRI is later today, and the Celtics should know by mid-afternoon. Until then, the season hangs in the balance.

And in case your mind isn’t entirely focused on KG, Rajon Rondo remains day-to-day. (WEEI)

“I don’t know if we’ll see him tomorrow or not but he’s getting close,” Rivers said. “Each time he’s worked out there’s been some swelling. That’s a concern. We’re going to take it slow. We’re not going to push him back, we’ll just wait until he’s ready to play.”