On September 13, 1983, Lachowicz made his major league debut at the Oakland–Alameda County Coliseum and pitched two scoreless innings of relief in a 6-5 loss to the Oakland Athletics. Lachowicz struck out Bill Almon for his first major league strikeout.
On September 13, 1983, Lachowicz made his debut in Major League Baseball at the Oakland–Alameda County Coliseum and pitched two scoreless innings of relief during a game against the Oakland Athletics, which ended with a 6-5 loss.  Lachowicz struck out Bill Almon for his first major league strikeout.