Mike Napoli was pulled in the third inning of Thursday night's game against the Baltimore Orioles.
Jim Rogash/AP

BALTIMORE (AP) -- Red Sox first baseman Mike Napoli has been sent back to Boston so doctors can examine him after an illness has kept him sidelined for several days.

Napoli was pulled in the third inning of Thursday night's game against Baltimore. He has not played since.

Boston manager John Farrell said Saturday that Napoli is still experiencing "some of the grogginess and the symptoms that he was feeling the other night." Napoli returned to Boston so team doctors can "try to get more information on what he's dealing with."

Farrell says: "There's a pretty high level of confidence that he's not dealing with anything concussion-related."

Napoli has reached base safely in 14 straight games and is batting .262 with nine homers. His 49 RBIs through Friday were tied for the team lead with David Ortiz.

Copyright 2014 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.

SI Apps
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide - from Peter King, Tom Verducci, Lee Jenkins, Seth Davis, and more - delivered straight to you, along with up-to-the-minute news and live scores.