Crazy defensive substitution

In 1999 why would Sveum (a 4 SS) substitute as a totally defensive move for Renteria (a 2 SS) late in a tie ballgame where no pinchhitting or pinchrunning was done that would require this? Is this just another Hal glitch in the system? These drive me crazy.

Doesn't look like this has gotten anyone fired up enought to weigh in . . . For my $0.02, it seems like a marginal upgrade. You're going from 2e30 to 4e8. There's a chart that should show if that's a net plus; I haven't consulted it in years, but my sense is it would be (at least in terms of getting first outs -- not sure how DPs gained/lost would affect it.)