Harrison (back) has progressed to throwing from 90 feet, but he's been slowed by stiffness in his hip, the Fort Worth Star-Telegram reports. "I can't complain. I feel really good," he said. "It's more tedious stuff than I've ever done before. It's kind of boring doing everyday but it's what I've got to do so it's what I'm going to do." Harrison will report to Surprise with the rest of the team's pitchers and catchers on February 16, but it's expected that he'll be sidelined until the second half of 2015 as he progresses through the final stages of his rehab following spinal fusion surgery on his lower back.