Morrison, 23, was one of the top rookies in the National League in 2010, batting .283 with a .390 on-base percentage after being promoted from Triple-A New Orleans in July.
Buck, 30, signed with the Marlins in November.
Also heading overseas from the organization are team president David Samson, plus special assistants Jeff Conine and Andre Dawson, who was inducted into the Hall of Fame in 2010.
The Marlins announced that members from the organization will visit United States military personnel serving in Southwest Asia and Germany from Feb. 3-11.
The trip is being made in association with Armed Forces Entertainment (AFE).
It's the second straight year the organization is sending representatives to military bases overseas. In late January and early February, the Marlins became the first MLB team to take active players to see the troops in Iraq and Kuwait since the war in Iraq began.
John Baker and Chris Coghlan were the players on that visit.
The trip will be covered extensively by www.marlins.com.
Included in Florida's contingent will be senior vice president of marketing Sean Flynn, marketing supervisor Boris Menier and FSFlorida Marlins Game Producer John Sulser. Also going are three members of the Marlins Mermaids dance team.
"It is an honor to once again visit the men and women fighting for our country," said Samson. "This is the second consecutive year the Marlins have embarked on a trip to visit our troops overseas. We intend to bring our American heroes a piece of our national pastime home and show them appreciation for what they do for our great nation."
Over the eight days, the contingent will be visiting United States bases in Asia. The trip will also include a stop at Landstuhl Regional Medical Center in Germany, which serves as the nearest treatment center for wounded soldiers coming from Iraq and Afghanistan.
"Other than Mom and apple pie what is more American than our national pastime-baseball," asks Lt. Col. Kathleen Weatherspoon, Chief of Armed Forces Entertainment. "We are thrilled the Marlins Baseball Team will be touring with Armed Forces Entertainment again this year. We know how busy this time of year can be with the team preparing to begin Spring Training, so we are honored that such senior executives, players and dance team members are taking time away from their hectic schedules to visit with our men and women in uniform. The dedication, intense training, and sacrifices these men and women have made to become professional athletes resonates with our military members who have the same characteristics as defenders of our Nation."