Mike Silva was the first to report the deal on Twitter.
Byrdak, 39, had surgery in early September to repair an anterior capsule tear in his left shoulder, as well as as surgery to repair a torn ligament in his knee.
“We are confident that Tim will experience a full recovery and be able to continue his Major League career,” Sandy Alderson said after the surgery.
Byrdak made 56 relief appearances in 2012, during which he went 2-2 with a 4.40 ERA in 30 2/3 innings. He gave up 18 hits, 18 walks and 34 strikeouts while giving up 15 earned runs and lefthanders hit .154 for the year against him.
Matthew Cerrone, MetsBlog.com:I have no problem with bringing back Byrdak, especially considering the emergence of Josh Edgin last season. However, the buzz last summer was that, even if everything went well in surgery, Byrdak would likely miss the bulk of 2012, because (as Chris Young and Johan Santana can testify) that shoulder surgery is no joke…
Michael Baron, MetsBlog.com:By bringing Byrdak back, this will allow him to maintain continuity in his rehab and, if he’s healthy and ready sometime in the second half, the Mets can see how he fits then. I’ll be curious to see how Byrdak does after this surgery given his age and his role. Terry Collins has said in the past he didn’t think Chris Young was a candidate for the bullpen due to the inability to predict when he would pitch in relation to his shoulder – presumably, Byrdak falls under the same umbrella, given both are recovering from the same injury.