His latest problem was diagnosed as an irritation of the left Achilles tendon. The prognosis was day-to-day.
Floyd was favoring the left leg, the leg that has been such a problem for him this season. His presence on the roster, something of an issue until the roster was submitted on Wednesday morning, now is a problem. The Mets were down to 24 men with seven innings and who knows how many games remaining.
Floyd aggravated the tendon strain he suffered while running the bases on Saturday in Game 3 of the NLDS against the Dodgers. On Thursday, he seemed to misstep as he approached first base after hitting a long foul down the left-field line. He limped conspicuously as he returned to the plate, where he spoke with manager Willie Randolph and trainer Ray Ramirez.
Floyd took one more pitch and then flied to left.
Endy Chavez replaced him in left field and in the No. 6 slot in the batting order.
"I don't think I've been this disappointed in a long time," said Floyd. "But I'm trying to tough it out. I just want to play and not let my team down. I can deal with the pain, but when stuff starts popping on you then I have to figure something out how to make this work. The most disappointing thing is that you can't help the boys."
Floyd received treatment on his Achilles each day since Saturday, declining to have the tendon examined via MRI exam on Tuesday. He was in the lineup for Game 1 on Wednesday, despite the chance of slipping on the wet surface, before it was postponed because of rain.
He spoke with the Mets' doctor on Tuesday, hours after the team's workout and after testing his leg by chasing fly balls in the outfield. Floyd acknowledged after the workout that his leg didn't feel as well as he had hoped, and he acknowledged on Wednesday that the condition of his leg deteriorates as the day goes on.
He also expressed a degree of surprise that he was on the roster and feared that his injury would undermine the team.
"It's tough to see Cliffy struggling with the Achilles," said Shawn Green. "He's a big part of the team, and we're in a position that everybody dreams of being in, so I know how hard it is for him right now."
Marty Noble is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.