Neil Walker (back) didn't report any setbacks after fielding grounders and taking batting practice Friday and doesn't expect to need restrictions going into the regular season. Walker was shutdown for the final month of the 2012 season with a herniated disc in his back, but the 27-year-old has been cleared for the start of spring training. "I've had no setbacks as far as the baseball stuff," Walker said. "As long as I'm doing what I need to do, there's no reason why this should ever be an issue again."