Yastrzemski, wearing his No. 8 jersey, threw out the first pitch before the game to David Ortiz.
The Giants have a three-game series in Boston starting Tuesday.
Ted Williams is the unquestioned best hitter in Red Sox history to most baseball aficionados. Who is No. 2? Some may say Carl Yastrzemski. But Yaz himself says it's David Ortiz.
From one Yaz to another.
An 18-time All Star and Hall of Famer, Boston's beloved Yaz turned 77 years old on Aug. 22, 2016. Carl Yastrzemski spent his entire 23-year career with Boston. His 3,419 hits are still a team record. Yastrzemski won the American League MVP award in 1967, when he also won the Triple Crown.