PT TOMORROW: NL West—Is all well in the ARI bullpen?

Arizona Diamondbacks

After hitting a rough patch in May, the Diamondbacks have resumed with their winning ways in June, thanks in part to a bullpen that leads the majors with a 2.55 ERA. Named as the team’s closer at the end of spring training, Brad Boxberger (RHP, ARI) has rewarded the Diamondbacks (and fantasy owners) with 14 saves in 16 chances, with a tidy 2.70 ERA (3.09 xERA), 12.3 Dom, and 147 BPV through 23 IP. But as pointed out in Brian Rudd’s FACTS/FLUKES column about a month ago, there were some warning signs that Boxberger was, to a certain extent, over-performing. Specifically, Boxberger’s 9% SwK, while acceptable, did not support the 12.0 Dom he was sporting at the time. 

Boxberger has been a bit on the shaky side of late,...

Almost!

You’re just a few clicks away from accessing this feature and hundreds more throughout the year that have a singular goal in mind: Winning your league. Subscribe to BaseballHQ.com here!

Already a subscriber? Sign in here

More From PT Tomorrow

This week, we point out an under-the-radar option in L.A., welcome starting pitchers back to Arizona and San Diego, check in on a favorite of ours in Colorado, and take a closer look at the Giants' starting rotation.
Sep 12 2026 3:05am
A look at how free agency, potential call-ups, and other roster decisions might impact lineups, rotations, and bullpens for all five teams next year.
Sep 10 2026 3:05am
After a brief demotion, Mickey Gasper's playing time has new life and may be gaining staying power. Plus, Aaron Judge looming for NYY, and more late-season playing time fallout.
Sep 8 2026 3:05am
This week, we say "hello" to yet another San Diego catcher, welcome another catcher back to L.A., try to read the playing time tea leaves in Arizona and Colorado, and check in on two Giants' rookies who are playing at a high level.
Sep 5 2026 3:06am

Tools