His efforts have raised more than $200,000 for the American Lung Association, a cause that he's personally passionate about. A few years ago, Morrison's father, Tom, passed away from lung cancer.
Morrison also has done charitable work for the Miami Children's Hospital, agreeing to shave his head a few months ago to raise awareness.
For his charitable efforts, Morrison is the Marlins' nominee for the 2012 Roberto Clemente Award, which honors players' off-the-field contributions.
The Roberto Clemente Award presented by Chevrolet pays tribute to Clemente's achievements and character by recognizing current players who truly understand the value of helping others. The award is named for the 15-time MLB All-Star and Hall of Famer who died in a plane crash on New Year's Eve 1972 while attempting to deliver supplies to earthquake victims in Nicaragua.
All 30 MLB clubs have a representative, and fans can vote for the winner on MLB.com.
"I'm truly honored to be selected as the Marlins nominee for the 2012 Roberto Clemente award," Morrison said via his @LoMoMarlins Twitter account.
Morrison recently underwent surgery on his right knee, and he's currently on the 60-day disabled list.
"LoMo is the type of player that he will help any organization," Marlins manager Ozzie Guillen said. "LoMo can go from here to any another team, and he will win it. He will be there, because that's what he likes. He likes to help people, help kids. I'm very proud, because the community means a lot to the Marlins.
"I was part of two organizations, the White Sox and the Marlins. The two owners and the people around them, they've huge in the community. That's very important."
Guillen adds that any player should be honored to be up for the award named after one of the greatest humanitarians ever to play any sport.
"Because of who [Clemente] was, what he meant to people, why they give this award away," Guillen said. "This isn't because you hit. This isn't because you pitch. This is because you help others. That's very important."