A lengthy moment of silence was held before the start of the Angels-White Sox game on Monday to honor all those affected by the terrorist attacks.
All fans at Angel Stadium stood and applauded five members of the Wounded Warriors Program at Camp Pendleton, who were honored at the pitcher's mound. The Marines had all spent time fighting in Iraq.
To represent the group, Cpl. John Walker of Ohio threw out the ceremonial first pitch to Angels outfielder Tim Salmon.
A contingent of Orange County EMS volunteers gathered behind the pitcher's mound and unfurled an American flag, while members of the Costa Mesa Fire Department served as honor guards.
The Orange County Sheriff Bugle Corps played a rendition of the Star Spangled Banner as the message "We Shall Not Forget" appeared on the two jumbotrons in the outfield.
As has been the case during Sunday Angels games since the disaster struck, "God Bless America" was to be sung during the seventh-inning stretch.
Players from each team wore hats with an American flag proudly displayed on the side.
Greg Wagner is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.