Of the 168 batters Corey Kluber has faced since May 8, he's walked none of them

Since walking Domingo Santana in the fourth inning of the Indians' 3-2 loss to the Brewers on May 8, Corey Kluber hasn't walked a single batter.
I want to emphasize how dramatic that is. 
He's faced 168 batters, and none of them has drawn a walk. That's 43 1/3 innings without a walk, the longest streak since Bartolo Colon went 48 1/3 walkless innings in 2015. The all-time record of 84 1/3 innings without a walk is held by Bill Fischer of the 1962 Kansas City A's.
More than that, Kluber has been in only 27 three-ball counts. And in those situations, he threw a ball out of the zone only nine times. 
So, how close did he actually come to walking someone? Let's investigate his three-ball counts more closely -- and then, make sure to watch him pitch against the Twins on Friday night at 7:10 PM ET: