 Willis was placed on the 15-day disabled list in March 2009 for an anxiety disorder after a blood test showed something of concern; he began a treatment regimen aimed at addressing the condition.Willis was taken off the disabled list and placed on the active roster May 13, 2009, when he made his first start of the 2009 season.Willis made seven starts after returning, with poor results, before being returned to the disabled list on June 19 with the same anxiety issue.