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

First base in Miami has been a hard position to rule for years, but a few players are vying for the crown. Plus: Riley in ATL; RF at NYM; CF in PHI; Littell in WAS; more.
Mar 17 2026 3:07am
Carson Williams has been staking his claim to the starting shortstop job for Tampa Bay, plus more from around the AL East as camps wind down.
Mar 17 2026 3:05am
NL West rotations are mostly set, but the rosters still have plenty of room for shuffling during the spring's remaining weeks.
Mar 14 2026 3:04am
Shane Drohan may be the most intriguing piece in the return for Caleb Durbin.
Mar 13 2026 3:05am
Top Twins prospects Walker Jenkins and Emmanuel Rodriguez will start 2026 at Triple-A, but seem likely to get a call-up at some point this season. Plus, saves in CHW, the Guardians' middle infield, an unknown Tiger, and Starling Marte and Lane Thomas in KC.
Mar 12 2026 3:05am

Tools