BOSTON (AP) -- The Boston Celtics have re-signed forward Jeff Green.

Green missed all of last season after a physical exam revealed an aortic aneurysm. He underwent surgery and became a free agent before signing Wednesday.

The 6-foot-9 Green had been expected to play a key role as a backup forward last season and is being counted on to do that next season. The Celtics obtained him from Oklahoma City in February 2011 with center Nenad Krstic and a first-round draft pick from the Los Angeles Clippers for center Kendrick Perkins and guard Nate Robinson.

In 2010-11, Green averaged 13.3 points, 4.8 rebounds and 32.4 minutes. For his four-year career, the former Georgetown player has averaged 13.9 points and 5.5 rebounds.