Reds:
Gene Locklear (63) -A Lumbee Indian out of North Carolina, Gene came through the Reds system along with Ken Griffey. He later became a really good commercial artist; you can see his stuff at www.genelocklear.com.
Mark Koenig -Shortstop on the '27 Yankees; the last living member of that team (Bill Werber, who was cut in training camp, outlived him). A Red in 1935.
Bob Meusel -Like Koenig, a member of the '27 Yankees; and like Koenig a Red later on (in 1930). Meusel hit for the cycle three times in his career, tying a record.
Others:
Rick Ankiel (33) -Well, at least it's been interesting; Ankiel has had a Mr. Toad's Wild Ride of a career. As a pitcher, he'll be remembered for the first game of the 2000 NLDS, where in one inning he walked four and served up five wild pitches. As a hitter, he and Barry Bonds are the only players to homer into McCovey Cove at PNC Park. Rick and Babe Ruth are the only players to do a number of odd pitcher-hitter things due to the flow of their careers.
David Segui (46) -Son of pitcher Diego Segui; Dwight Evans played with both father and son. Admitted to taking HGH when it was legal, and was a reluctant witness in the Roger Clemens thing.
Phil Cavarretta -Came to the majors at age 18 years and 2 months and stuck around for 22 years, mostly with the Cubs. He's the only player to be active at the same time as both Aaron and Ruth, and at the time of his death in 2010 he was the last living player to have played against Ruth (the Babe is all over today's birthdays). He was a Cub teammate of Kiki Cuyler and Gabby Hartnett as a rookie, and stuck around long enough to be a teammate of Ernie Banks.