I seem to recall that Smithy was dealing with some personal demons in 1999 and left the Padres to take care of his problems. He told Dierker personally during a series at the dome. That same series, Dierker collapsed in a seizure caused by a brain tumor. I may have some of dates mixed up, but I do recall thinking at the time that hopefully both Smithy and Dierker could fight back and conquer the stuff that had beset both of them and get back to baseball.
Sad news today, RIP Smithy, the best example of how being a closer isn't entirely about blowing people away... it's about getting three outs quickly and effectively to close out the game.