Rodriguez (knee) will rest his knee for 3-to-4 weeks at the suggestion of Dr. James Andrews, Evan Drellich of CSN New England reports.

Rodriguez sought out a second opinion on his ailing knee Monday, and although no ligament damage was found, there's a decent chance that the southpaw won't be available to pitch until the end of the season. The Red Sox also haven't ruled out surgery altogether, as it may be necessary later in the season or during the offseason if the rest alone doesn't help. Overall, this is still tough news, as it's hard to envision Rodriguez making many more starts this season. More information on a potential return date should come forth once he begins ramping up his activities again, which could be in early July.