Lansing Lugnuts
Affeldt improved with the GCL Royals the next year, going 4–3 with a 2.89 ERA in twelve games (nine starts). His performance even earned him a promotion to the single-A Lansing Lugnuts. Affeldt did not do well in his time with them, though, as he went 0–3 with a 9.53 ERA in six games (three starts).