Admitting a recent ankle injury has led to "some fatigue" in his surgically repaired left shoulder, the Mets placed Johan Santana on the disabled list before Saturday's game against the Dodgers.

Since hurling the elusive first no-hitter in team history on June 1 against St. Louis, Santana has pitched to a 6.54 ERA over eight starts, including six earned runs in just three innings in Friday's 7-6 loss to Los Angeles.

Santana' right ankle was twisted when stepped on by Chicago's Reed Johnson while covering first base on July 6.

"Johan, I think, has exhibited the effects of 100 innings and a sore ankle the last couple of starts. We think the ankle injury might have led to some general fatigue in the shoulder," Mets general manager Sandy Alderson said.

"In light of the surgery and where he's been and what he's accomplished, we've gotten to the point that he probably needs to get that ankle right and get back to the point where he feels confident about pitching."