WEDNESDAY, 2:28pm: ESPNBoston's Joe McDonald tweets that Nelson has cleared waivers, so we should find out tomorrow whether or not the righty will accept a minor league assignment.
FRIDAY, 7:49pm: Nelson hinted at retirement following the move, according to MLB.com's Ian Browne.
"I've got a flight at 7:15, and I'm going to Florida and in all likelihood, if I clear waivers, I've probably thrown my last pitch," said Nelson. "I don't anticipate myself going back to [Triple-A] Pawtucket, but that's emotion talking right now and we'll probably reanalyze it when I'm not as disappointed. I had every opportunity and I didn't produce. The thought of going to Triple-A doesn't sound that great. We'll wait and see what options present themselves."
Nelson battled major arm injuries early in his career, including a pair of surgeries to repair the labrum in his throwing shoulder. He broke through with the Royals in 2006, but has bounced around quite a bit since. Baseball-Reference.com has his career earnings at just under $1.7MM.
2:41pm: The Red Sox designated Joe Nelson for assignment as part of a flurry of moves, according to Amalie Benjamin of the Boston Globe (via Twitter). The team also activated Jonathan Papelbon from the bereavement list, called up Scott Atchison and placed Jeremy Hermida on the DL.
Nelson, 35, had a 9.72 ERA in 8.1 innings this year with 9.7 K/9 and 6.5 BB/9. Those high strikeout and walk rates are characteristic of the ones the right-hander has posted over the course of his six-year MLB career. Nelson posted a 2.49 ERA in 21.2 innings at Triple A this year, with similarly high strikeout and walk numbers.