DETROIT -- Dontrelle Willis was scheduled to visit with a doctor in Columbus, Ohio, on Thursday after leaving his rehab start for Triple-A Toledo Wednesday night with recurring soreness in his right hip.

Willis, who has been on the 15-day disabled list since mid-June with continued anxiety disorder, was making his first rehab outing in hopes of returning to the Tigers sometime in September. His sore hip pushed back his start from Monday to Wednesday, but it continued to bother him once he took the mound against the Clippers.

Willis lasted 1 1/3 innings before he couldn't go any longer. He gave up one run on a hit with one walk and one strikeout, throwing 13 of his 24 pitches for strikes, before he left the field.

Dr. Grant Jones was scheduled to examine Willis Thursday for what head athletic trainer Kevin Rand called diagnostic testing before the Tigers decide how to proceed from there.

Not until then will the Tigers know how long he could be out or whether he can continue trying to get back to Detroit this season.

The injury continues a season that never really got started for Willis. He began the year on the DL with anxiety disorder, but worked his way back to the Majors in May and made it back to the Tigers rotation. He pitched 6 1/3 scoreless innings against the Rangers on May 19 for his first Major League win since 2007, then pitched a quality start in his next outing, before his struggles with command returned. He was sent back to the DL after walking eight batters over 3 2/3 innings June 14 at Pittsburgh.