Manuel spoke a little more about that decision before Friday's home opener against the Royals at Citizens Bank Park.
"I thought Lee's best three innings were his last three," Manuel said. "If somebody had gotten in scoring position, I'm not saying I would have taken him out, but the way it happened, it was real easy for me to leave him in."
Adams signed a two-year, $12 million contract in the offseason. Manuel said there was no need to talk with Adams after the game.
"I think he knows where he stands," Manuel said. "I think he knows the game. I'm pretty sure he did."
Todd Zolecki is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.