Wes Welker is a 34-year-old free agent who has suffered multiple concussions. But he’s not ready to call it quits just yet. The former New England Patriots wide receiver did a Boston media tour Tuesday morning, appearing on 98.5 The Sports Hub’s “Toucher & Rich” radio show before stopping by WEEI’s “Middays With MFB.” Always the entertaining guest, Welker once again denied rumors he’s retiring and said he’d be open to coming back to New England if the opportunity arose. “I wouldn’t be opposed to it,” Welker told “Toucher & Rich,” via CBSBoston.com. “It’s a great organization, obviously, and a great team. It wouldn...