Good News, Bad News
The good news is that yes, the Mark Lee who seved as V.P./Sales & Marketing Director for the Amarillo Dillas is the same Mark Lee who pitched several years in the big leagues for the Padres and Pirates.
Now for the bad news: The Dillas are no longer. The Amarillo Dillas have folded, likely for good, after being run into the ground of late. Their replacement in the Central League is the independent iteration of the El Paso Diablos.
Still, it appears Mark remains local to Amarillo, having worked for the American General Insurance Co. for a long time before joining the Dillas. So it should be easy enough to track him down in Amarillo.