"He's not ready to end his career," the person told Puma.
Meanwhile, according to Puma, Dr. James Andrews in Birmingham, Alabama believes the re-tear is "degenerative," meaning the injury was not isolated to a single event.
Yesterday, Sandy Alderson told reporters Santana had likely re-torn the anterior capsule in his left shoulder, which was the same injury that required surgery in September, 2010. Santana required 19 months of rehab on his shoulder after the first surgery.
Alderson said Santana would remain in New York and would decide about his future over the weekend.
Santana is in the last year of six-year, $137.5 million contract he signed with the Mets before the 2008 season.
He is owed $25.5 million this season. There is a 2014 club option for $25 million, with a $5.5 million buyout.