Right-hander Bradley Blalock in 2025 had a 9.36 ERA, 7.31 FIP, and -1.0 fWAR through 58 ⅔ innings. Horrible numbers. Although digging way in, some intriguing traits may explain why the Miami Marlins claimed him from the Colorado Rockies in January.

Putting the results aside, Blalock has a high arm slot, good metrics on his fastball, a strong splitter, and a deep pitch mix. 

Blalock’s 62-degree arm angle was the second-highest among qualified righties last season. It plays well with his fastball and above-average extension, something that the Marlins have targeted with other arms as of late.

With 16 inches of induced vertical break, minimal horizontal break (2″) and average velocity, Blalock’s fastball should perform better than it has (.431 xWOBA). His past struggles mainly had to do with it being thrown so much middle-middle.

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He will have to locate it outside the strike zone more often. 

Highlighting Blalock’s best pitch, his splitter, this may have enticed the Marlins to claim him as they have targeted many other split-throwers during the Peter Bendix era so far. Blalock mainly threw his to lefties. It limited damage compared to his other pitches (.318 xwoBACON) and induced more frequent whiffs as well (24.7%).

I foresee the Marlins increasing his splitter usage, including throwing it against right-handed hitters.

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Blalock throws a slider, although it’s mainly utilized vs. righties. The pitch did not perform well. While training at Driveline Baseball this offseason, the 25-year-old says he added a sweeper and sinker. That combination could help him generate more ground balls. 

A cutter and curveball are also used by Blalock. The curveball, like his slider, was destroyed by hitters (.565 xwoBACON). It has a lot of break to it, but does not get hitters out. However, his cutter may have potential. It generated ground balls at a 50% clip, with a 21.2 whiff% and zero barrels allowed. Blalock threw the pitch to hitters of either handedness. Upping its usage could be the next step. 

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With this much-needed change of scenery, Blalock may be on the upswing. As bad as his first two seasons in the major league looked, there is an opportunity with the Marlins if they hit on the right combination of pitch mix tweaks, sequencing changes, and potential biomechanical adjustments. He has one more minor league option left in case it takes some time to recalibrate to his new arsenal. Blalock could eventually offer bulk innings out of the ‘pen for the Fish.