ESPN New York's Adam Rubin reports that the Mets have shown interest in free agent Roy Oswalt. Despite agreeing to terms with Shaun Marcum earlier this week, a source tells Rubin that the Mets haven't ruled out adding Oswalt to their starting rotation mix. The 35-year-old went 4-3 with a 5.80 ERA in 17 appearances (nine starts) with the Rangers in 2012 while dealing with injuries down the stretch. He remains undecided on whether to continue pitching in 2013 and hasn't received any other known interest in free agency.