Okay - so it was just a CPU game but still—he's a reliever. I've been working on getting him to P5 and so I've been starting him (usually replacing him around the 6th with a SP when he comes up to bat). He was completely gassed by the 6th and threw over 100 pitches (I think the last count I saw was110) so getting the ball in the strike zone was challenging - but he did it. 20 K's, 2 walks and only 1 hit. Not bad for a reliever.
Joe Morgan also hit for the cycle (I stopped him at second instead of going to third for his last hit) too...I wish the game would have a cut scene for when players hit for the cycle.