For the 4,703 at-bats in his baseball career, Johnstone has recorded a batting average of .267 with 1,254 base knocks. He has gone yard 102 times, with 1,851 bases in total and a .048 slugging %. Johnstone has drawn a walk 429 times while striking out on 632 occasions. He has recorded 578 runs and racked up 531 runs batted in. His on-base percentage is .329 and he holds a career OPS of .377.
