Blas CastañoCOL · RP

2026 review

Blas Castaño was a hard-contact reliever whose ERA outran the quality of what hitters did against him: across 15 games and 0 GS he posted a 3.62 ERA and 1.32 WHIP in 27.1 IP, with an 18.9 K% and an 8.1 BB% over 111 BF. His 49.4 Hard% over 79 BBE was the 1st highest of 517 pitchers with 100+ BF, and his 3.62 ERA ran 2.34 below his 5.96 xERA over 111 BF. He bounced through waivers early, optioned by SEA on Mar 11, designated for assignment Apr 14, then claimed off waivers by COL from SEA on Apr 21, after which he was optioned and recalled repeatedly through Apr 26, Apr 27, May 17, May 18 and May 21. A right pectoral strain put him on the 15-day IL Jun 21 (retroactive to Jun 18), and he missed 51 regular-season days before he was activated Aug 8, then optioned the same day, recalled Sep 1 and optioned again Sep 15. Undrafted in NFBC drafts, he finished 578th of 1472 in the TDK LABS 5x5 value rank and 228th of 575 relief pitchers. The TDK LABS card had him as a thin-margin Colorado callup in mid-May, and by early Sep it still had him working long relief in a crowded, shifting Colorado bullpen.