James Marbury "Sammy" Holbrook (July 17, 1910 - April 10, 1991) was an American Major League Baseball catcher.

That year, he served as the primary backup to starting catcher Cliff Bolton.

Holbrook's minor league baseball career spanned 14 seasons, from 1929 until 1942.

Holbrook batted .361 in 98 games while leading the team to the league championship in his only season as manager.

This biographical article relating to an American baseball catcher born in the 1910s is a stub.