Smith was traded from Atlanta to the Montreal Expos on July 2, 1989, for Sergio Valdez, Nate Minchey and minor leaguer Kevin Dean.

Just over a year later, on August 8, 1990, Smith was traded to the Pittsburgh Pirates for Scott Ruskin, Willie Greene and Moisés Alou.

The trade allowed the Pirates to hold off the New York Mets down the stretch and win the National League Eastern Division pennant.

On April 17, 1988, Smith got Atlanta's first victory of the season, ending a 10-game season-opening losing streak that set an MLB record.

On October 3, 1995, Smith gave up a walk-off home run to Tony Peña to end Game 1 of the 1995 American League Division Series.