What happened: Mason Miller dialed up a 102.9 mph fastball, the kind of triple-digit heat that has come to define his work out of the bullpen. The velocity is among the hardest thrown by any reliever in the game this season.

Why it matters: Velocity like this is what makes Miller one of the most difficult late-inning arms to square up. It builds on a stretch in which he has been nearly untouchable, reinforcing his value as a back-end weapon when games are on the line.

What to watch: Watch whether Miller can sustain the triple-digit readings deep into the season and how often he is leaned on in high-leverage spots.