5:46pm: Todd Zolecki of MLB.com says that Baez is "a good bet" to be the mystery pitcher.
3:26pm: The Philadelphia Phillies have an agreement in place with a relief pitcher, according to Jim Salisbury of CSNPhilly.com -- we just don't know yet who the pitcher is. Salisbury's source says that the agreement with the mystery player is pending a physical, which will occur in the first week of the new year.
With Fernando Rodney and the Angels having agreed to terms, the two likeliest candidates for the Phillies' bullpen appear to be Danys Baez and Mike MacDougal. ESPN.com's Jayson Stark linked Philadelphia to Baez earlier, and another of Salisbury's sources confirms that the team's focus has been on the right-hander lately. We also heard earlier today from Matt Gelb of the Philadelphia Inquirer, who said that the Phillies had been in touch with MacDougal. Scott Lauber of the News Journal mentions some other possibilities, but agrees that Baez and MacDougal look like the top two relief targets for Philadelphia.