FILE - In this Sept. 9, 2012 file photo former Green Bay Packers quarterback Bart Starr waves to fan …
Hall of Fame quarterback Bart Starr has began participating in a clinical trial using stem cells to treat strokes.
Last September the legendary Green Bay Packer had two strokes and a heart attack that led his family to applying for a clinical trial using stem cells. Starr, 81, has undergone two treatments so far.