Craig Kimbrel hasn't allowed a run since May 7. The stretch of dominance has lowered his ERA from 3.38 to 1.85. Kimbrel allowed five earned runs over five appearances between April 24 - May 7, but hasn't surrendered a run outside of that rough patch. He's not striking out batters at the ludicrous rates of the past two seasons, but may well end up as fantasy's best closer anyway.