The Mariners signed Joe Nelson and assigned him to Triple A, according to Dan Hoard, the radio announcer for Pawtucket Red Sox games (Twitter link). The Red Sox designated Nelson for assignment earlier in the month, at which point he hinted at retirement. The Mariners signed the righty after he cleared waivers.
Nelson, 35, had a 9.72 ERA in 8.1 big league innings this year, walking six and striking out nine. Those high strikeout and walk rates are characteristic of the ones Nelson 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.