Charles Benjamin "Babe" Adams (May 18, 1882 – July 27, 1968) was an American right-handed pitcher in Major League Baseball (MLB) from 1906 to 1926 who spent nearly his entire career with the Pittsburgh Pirates.

[1] He made his MLB debut on April 18, 1906, with the St. Louis Cardinals, taking the loss in a 4-inning start, but did not pitch again for them.

After going 12–3 with a 1.11 earned run average (ERA) in the 1909 regular season, his first full year, Adams became the star of the 1909 World Series after being named the surprise starter of Game 1 following a tip by National League president John Heydler that Adams' style was similar to that of an AL pitcher whom the Detroit Tigers had difficulty playing against.

An off-year in 1916 that saw his ERA rise to 5.72 got him farmed out to the Western Association, but late in 1918 he found his stride again and rejoined the Pirates, where he stayed until 1926.

On July 17, 1914, he pitched a 21-inning game against the New York Giants without allowing a single walk, surrendering only 12 hits, but losing 3–1 on Larry Doyle's home run in the top of the 21st; it is the longest game without a walk in major league history.