Polanco underwent an MRI on Monday and will receive a shot on Tuesday and be re-evaluated on Friday. If Polanco has to undergo surgery, Amaro said doctors told him Polanco could return in three to four weeks.
"Frankly a lot of guys have played through this injury," Amaro told reporters, including Jim Salisbury of CSNPhilly.com. "It's just a matter of the discomfort. If it's too great, we'd probably have to do a procedure, but it would not necessarily end his season.
"I think we can manage this and get him through the season, but we'll know more Friday."
Amaro noted Raul Ibanez played through a sports hernia in 2009 and it was more severe than Polanco's injury.@cbssportsmlb on Twitter or subscribe to the RSS feed.