Mike Yastrzemski, for whatever he ends up being as a player, is one of the greatest examples of Farhan Zaidi’s successful roster churn. In 2019, the Baltimore Orioles traded Yaz to the San Francisco Giants for minor-league pitcher Tyler Herb. Three years later, Herb has not yet cracked the majors and is now on the Seattle Mariners—meaning the Giants essentially got Yaz for nothing.
In parts of three major league seasons with the Giants, Yaz has put up 7.1 fWAR in 300 games, batting .255/.336/.500 with a 121 wRC+. Those numbers are buoyed by his exceptional 2020 season, where he finished 8th in NL MVP voting after putting up a .