Quinn MathewsSTL · SP

2026 review

Quinn Mathews was a rookie left-hander who arrived in Aug and threw strikes more than he missed bats: a 3.83 ERA and 1.38 WHIP in 49.1 IP over 9 games and 9 starts for STL, with a 21.8 K% and a 9.5 BB% over 211 BF, going 2-4 with 5 HR allowed. His contract was selected Aug 1, then he was optioned Aug 4, recalled Aug 17, optioned Aug 18, and recalled again Aug 22, working 19.2 IP over 4 games in Aug and 29.2 IP over 5 games in Sep. Drafted at NFBC ADP rank 1210, he finished 747th of 1472 in the TDK LABS 5x5 value rank, 463 spots above, and 113th of 236 starting pitchers. The TDK LABS card tracked the arc from prospect to rotation piece: in late Jul it had him about to debut after being sharp, by mid Sep it pointed to consecutive strong outings and a lengthy hitless stretch within a start, and by late Sep it settled on a rookie arm coming off a solid run of outings.