He played in Major League Baseball (MLB) from 1982 through 1997 for the Kansas City Royals, Texas Rangers, New York Yankees, Pittsburgh Pirates, California Angels, Chicago White Sox, and San Diego Padres.

In 1979, Slaught and UCLA pitcher Tim Leary were named to the College Sports Information Directors of America university all-star team.

Slaught saw action in 116 games, the third-busiest season he spent in the major leagues; he hit .300 with 10 home runs and 55 RBI with the increased playing time.

[3] He played with Pittsburgh through 1995, split 1996 between the California Angels and Chicago White Sox, then retired after getting no hits in 20 at bats for the 1997 San Diego Padres.

He founded RightView Pro the first video analysis system for baseball and softball licensed by MLB, MLBPA, and the NPF.