In 1916, a struggling Oaks team made history by (inadvertently) breaking the professional baseball color line, as Jimmy Claxton pitched in both ends of a double-header on May 28, 1916.

In 1943, a controlling interest in the Oaks was purchased by C. L. "Brick" Laws, who operated the team for its remaining seasons.

The 1948 Oaks were nicknamed the "Nine Old Men" in that many of the star players were older veterans, including Ernie Lombardi, Billy Raimondi, Cookie Lavagetto, Nick Etten and Catfish Metkovich.

Rooming with Martin and playing shortstop was Artie Wilson, the first black player on the Oaks since Jimmy Claxton was fired.

[citation needed] Augie Galan replaced Ott as the Oaks' skipper in 1953, and the team stumbled to a 77–103 record and seventh place in the PCL.

The Acorns finished third with an 85–82 record under Dressen, but won the postseason series to capture their last PCL pennant.

Dressen returned to managing at the major-league level in 1955, taking over in the Washington Senators' dugout, making way for San Francisco Seals legend Lefty O'Doul in Oakland.

The only thing left in the area to suggest that baseball was ever played at Park and San Pablo Avenues is a cardroom and restaurant across the street, appropriately named the Oaks Club.