Matzek (personal) rejoined the Rockies on Thursday, Nick Groke of the Denver Post reports.
Bothered by performance anxiety since the middle of last season, Matzek spent the past month working with mental skills coach Rick Perea, a former NFL linebacker who also does work for the Denver Broncos. Injuries are taking a toll on the back end of the Rockies' rotation, yet Matzek still doesn't figure to be an option for the first few weeks of the season. He may stay behind at extended spring training, and eventually figures to pitch for Triple-A Albuquerque.