Walker was projected for $2.9 M, so his estimate salary will go up regardless of which side wins. The two sides could still meet in the middle. They're only $600,000 apart, so you'd think a deal wouldn't be hard to reach. Then again, Garrett Jones went to arbitration last year over a difference of $250,000, so nothing is guaranteed.
We still haven't heard about James McDonald or Garrett Jones. I'll update this post when those figures are announced.
UPDATE 5:37 PM: Heyman has the details on James McDonald.
Tim is the owner and editor in chief of Pirates Prospects. He started the site in January 2009, and turned it into his full time job during the 2011 season. Prior to starting Pirates Prospects, Tim worked with AccuScore.com, providing MLB, NHL, and NFL coverage to various national media outlets, including ESPN Insider, USA Today, Yahoo Sports, and the Wall Street Journal. He also writes the annual Prospect Guide, which is sold through the site. Tim lives in Bradenton, where he provides live coverage all year of Spring Training, mini camp, instructs, the Bradenton Marauders, and the GCL Pirates.