Boyle was hit up high by Capitals defenseman Brooks Orpik midway through the third period. He remained on the ice for several moments, visibly woozy, before skating off to the locker room under his own power. He did not return to the game.
Orpik will not be suspended, Matt Larkin of The Hockey News reports.
Rangers coach Alain Vigneault told reporters Boyle is "all good." Boyle did not speak with the media after practice.
The Rangers' Eastern Conference finals series against the Lightning begins Saturday afternoon in New York.
- Dan Gartland