Phillies general manager Ruben Amaro said Thursday that it "seems likely" John Lannan (knee) is headed back to the disabled list. "It appears that he has similar symptoms to those he experienced earlier this season with tendinitis of the patellar tendon," Amaro said. "We will conduct a repeat MRI and will know more about his injury once the MRI is performed. It seems likely that he is headed back to the disabled list." Lannan, who suffered the injury Wednesday, missed two months of action earlier this season with the same injury, so his season could be over.