The New York Mets expect Matt Harvey to start on Opening Day despite a health scare.

"It started with a bladder infection and it created a blood clot in the bladder," Harvey said. "I passed it yesterday. It wasn't a great first day [after] my 27th birthday. But we cleared that. And then we had a little procedure done this morning just to go in and check the bladder and everything was clear."

Harvey originally had been scheduled to pitch Tuesday's Grapefruit League game. He instead intends to pitch on Wednesday for a couple of innings.

"I'm cleared to go, cleared to do some minor activities today," Harvey said. "And then we'll be back to normal tomorrow."

Asked if he was initially concerned about it being something more serious, Harvey said: "For me, yeah. I didn't really know what was going on. I was having trouble using the restroom. Any time there's discoloration in your urine, it's not a great feeling. So I didn't know what was going on with my stomach. We had some tests yesterday and everything is fine now."