I caught a few games in '98 while he was playing for Houston, too. I don't remember if he pitched in any of those games or not. I guess I should have taken notes or pictures. My CRS is really kicking in these days.
Here you can see the Big Unit as an Astro on his 1999 Fleer Ultra card #166. I took the liberty of adding some text, even thought he didn't achieve this milestone as an Astro. It's an Astro blog and I'm running things around here. Then again I guess I could have downloaded an image of a current card but where's the fun in that?