What happened: Louis Varland has converted all 17 of his save opportunities, a flawless 17-for-17 conversion rate out of the bullpen. Every time he has been handed a save chance, he has closed it out.

Why it matters: A 100 percent save-conversion rate is the hallmark of a trusted late-inning arm, giving the coaching staff a reliable answer in close games. Locking down the ninth inning removes a major source of variance from tight contests and lets the rest of the bullpen settle into defined roles.

What to watch: Watch whether Varland can extend the perfect streak as the save chances pile up and the schedule tightens.