Colorado Rockies first baseman Justin Morneau, who has missed three games since he was injured while diving for a ground ball during Wednesday night's loss to the Los Angeles Angels, was placed on the seven-day concussion disabled list.
In addition to his concussion symptoms, he has a cervical neck sprain.
Morneau has suffered multiple concussions in his career, and missed much of the 2010 and 2011 seasons while dealing with concussion-related symptoms and other injuries.
The Rockies recalled infielder/outfielder Rafael Ynoa from Triple-A Albuquerque to fill Morneau's roster spot.
Morneau, who turned 34 on Friday, is batting .290 with three home runs and nine RBIs in 27 games this season.
Information from The Associated Press was used in this report.