The procedure will be performed by New York-based orthopedist Bryan Kelly, possibly as early as Thursday.
In the meantime, the Phillies have to move forward without their No. 2 starter. But they're hardly panicking.
"I look at the players, and when you lose somebody, you always have to plug someone in there," Manuel said. "We'll plug him in and stay with it. ... I want Myers to get healthy and well. Once he's not there, we've got to focus on who we have and what we got."
What they have is a resilient team that won for stretches last season without the likes of Chase Utley, Jimmy Rollins and Brad Lidge.
No matter the circumstances, the Phils will support each other. It worked last season en route to the World Series and it has worked thus far in 2009.
The club's roster could be tweaked with a trade or a callup from the Minor Leagues.
"In this game, so many things can happen, and you can't put pressure on yourself," said center fielder Shane Victorino. "We did it last year. When guys got called up, they did the job and filled in. We're not going to change anything. You do what you can with what you have."
The news about Myers stunned some teammates.
"It is a big blow for us," Lidge said. "Someone will step in to his spot. I've had some injuries, but not for a season. I'm sure the goal for Brett is to make it back. It's going to be tough mentally and you have to go day-by-day."
"When he was on, he was a big part of our staff," Victorino added. "He's going to be missed. Every team goes through injuries like this. You just hope he gets better and comes back."
Andy Jasner is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.