Allen Robert Lachowicz (born September 6, 1960) is a former American Major League Baseball pitcher who played for the Texas Rangers during the 1980s.

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.

In front of a small crowd of 8,727 he pitched six strong innings, giving up just two earned runs, but the Rangers lost to the California Angels 2-0.

Career totals include a 0-1 record, eight strikeouts in eight innings pitched, and an earned run average of 2.25.