Kruczynski has been an incredibly valuable considering his bonus and amateur pedigree, a senior money-saver who signed for just $3,000 out of East Carolina. The lefty moved quickly through the system in his first full pro season and was successful at every stop, finishing in Double-A. The Cardinals challenged him with an assignment to Fall League, and despite being tired and losing a few ticks of velocity, Kruczynski still pitched well there. At his best, the 6-foot-5 southpaw works in the 89-to-92 mph range on his fastball, pounding the zone and frequently getting ahead. He changes speeds well and throws a curve, changeup, and slider for strikes. Kruczynski might lack the carry pitch for a true back-rotation profile, but his left-handed pitchability gives low-end #5 starter or swingman upside.