ESPN's Adam Schefter is reporting Sunday morning, Steelers RG David DeCastro has a torn MCL, but the team isn't sure at this time whether his ACL is also torn.
Schefter says DeCastro is scheduled to undergo an MRI around lunchtime today to get an official diagnosis.
If it's just a torn MCL, it's likely DeCastro would return to the field in 2012. There are three grades of torn MCLs, 1, 2 and 3, with one being the least severe. Grade 3 MCL tears usually require 4 to 8 weeks to heal. Torn MCL's do not typically require surgery.
It's all connected to any damage potentially done to the ACL. A torn ACL would mean he would miss the entire season.
The report itself doesn't suggest the ACL is not torn, it's just they feel the MCL is definitely torn, meaning DeCastro should expect to miss At least the first few games, but it's a glimmer of hope that the rookie may not miss his entire first season in the NFL.