Yastrzemski, 28, is the grandson of Hall-of-Famer Carl Yastrzemski. He’s made a six-year lap through the Oriole farm, with early highs eventually offset by upper-minors woes. His 2018 season was arguably his best, at least at the AAA level, with the lefty slashing a solid .265/.359/.441 in 374 plate appearances for Norfolk. He’ll provide depth at all three outfield spots for a Giants club starving for warm bodies at each of them.
Herb, 27 next month, began his professional career with Seattle before being sent south as the player to be named later in the Chris Heston deal. 2018 was a struggle for Herb: 13 starts made up his first AAA taste, and it quickly went sour, with the righty posting a 5.35 ERA/5.05 FIP in 70 2/3 innings for Sacramento. Herb has always had issue missing bats, though his repertoire could safely be counted on to induce a high number of grounders. It didn’t last season, though, as the righty posted a career-low 38.1% grounder rate.