Some prodigal sons come, some prodigal sons go. In the case of Justin Masterson, it looks as if the former Red Sox hurler will become a Red Sox hurler again. ESPN.com's Buster Olney is reporting that Boston has "an agreement" in place to sign Masterson. It's unclear whether it's a one- or two-year pact, but the signing gives further shape to the 2015 rotation. Rick Porcello, Clay Buchholz, Wade Miley, Joe Kelly, and Masterson would be a decent group—if there's a true ace at the top. Boston can still make that happen (to a greater extent) by trading prospects for Cole Hamels or (to a lesser extent) by signing free-agent James Shields. Stay tuned, more stuff is certain to happen today.