Retired Boston Red Sox slugger David Ortiz received his second honorary degree on Sunday.

Boston University awarded the former designated hitter an honorary doctorate of humane letters at the school's commencement ceremony.

Ortiz, known as "Big Papi," was chosen for the honor because of his accomplishments on the field and in his charity work.

He was expected to attend the 1 p.m. ceremony but wasn't scheduled to speak. Bonnie Hammer, chairman of NBC-Universal Cable Entertainment Group, was scheduled to give the commencement speech.

In April, Ortiz accepted an honorary degree from the New England Institute of Technology in Rhode Island and delivered the commencement address.

Ortiz joined the Red Sox ahead of the 2003 season and retired in the fall. He's credited with helping the Red Sox win three World Series titles.