DALLAS - Blues left winger Andy McDonald was sent back to St. Louis this morning to visit with club doctors after suffering a possible concussion in Thursday's 3-2 loss to Dallas.

In the closing seconds of the second period, McDonald was bumped from behind by teammate Nikita Nikitin, and with his body moving forward, McDonald was hit in the head by the Stars' Vernon Fiddler. The hit is considered to be clean and might not have even happen if McDonald wasn't bumped by Nikitin.

McDonald spent the second intermission being evaluated by Blues trainer Ray Barile and Dallas doctors.

"He came in and saw our training staff, saw (Dallas’) doctor, talked to our staff and said he was ready to play the third period," Blues GM Doug Armstrong said. "So he went out and played the third, and then today he said he just wasn’t feeling quite right. So we decided to send him back to St. Louis to see our medical staff."

McDonald, who will further evaluated by Dr. Rick Wright in St. Louis, has suffered from several concussions in his NHL career, with Anaheim previously and in St. Louis. He missed 24 games last year after being concussed Dec. 4 in Edmonton.

"We don’t want to underreact or overreact to this," Armstrong said. "We want him to get to St. Louis and hopefully we’ll have more information for you in the next 48 hours."

The Blues, who play in San Jose Saturday night, don't plan to call up a forward. Evegeny Grachev and Chris Porter have been healthy scratches in the first three games and Blues coach Davis Payne said that one of them would be inserted into the lineup. Grachev showed chemistry with McDonald's linemates, David Backes and Jamie Langenbrunner, in the preseason.

"This is one of the things we talked about, this is one of the things we knew we were going to face," Payne said. "Top-line guys or anybody else, guys have to step forward. This is why we have the depth we do."