On June 30, 2001 Oakland defeats Texas, 15 – 4, as SS Miguel Tejada hits three home runs and a single and drives home eight runs. Tejada had gone 26 games without a homer before hitting a grand slam in the 1st, followed by a three-run shot in the 2nd. He adds a solo blast in the 9th. Erik Hiljus is the benefactor, winning his first major league decision. Hiljus also strikes out four batters in the 7th.

Source
Baseball Reference June 30