The M’s are adding four players to the roster today. RHP Aaron Taylor, 3B Greg Dobbs, OF Jeremy Reed, and C Rene Rivera will join the team for September. The M’s will have to make a corresponding roster move to free up a 40-man spot for Rivera, which will likely be the switch to the 60 day DL for Pineiro or Blackley.
With Rivera getting added to the 40-man, the list of open spots for protecting players from the rule 5 draft this fall continues to shink. The M’s are going to have to make some tough calls on some interesting players, and guys like Ryan Rowland-Smith, Rich Dorman, and T. J. Bohn are now almost certain to be available to any team who wants to pluck them from the M’s system.
Edit: As noted by JC in the comments, Mickey Lopez is reportedly getting the call as well.
Edit part two: Rivera has not been called up. They changed their minds.