Livermore native Tanner Griffith at his signing with Major League Baseball team the Kansas City Royals. He went on to start playing for the local Livermore Little League baseball team. When he was 12-years-old, he notably played for the KC Royals Little League baseball team. Von Glanhn also mentioned that Griffith had played in the Little League World Series that Livermore hosted one year. Image 1 of 3 ▼ Tanner Griffith posing in a Kansas City Royals Little League uniform with a baseball mitt in 2017.