He joined the Brooklyn farm system in 1942, and then played semipro baseball for three years during World War II.

When the war ended, the Dodgers assigned him to Double-A Fort Worth, where he posted standout seasons in both 1947 and 1948, winning 38 of 50 decisions, with 37 complete games.

[2] The Dodgers brought him to the majors as a 31-year-old rookie for his first taste of major-league action in September 1947, then sent him back to the minor leagues for part of 1948 and all of 1949 before he returned to Brooklyn in 1950.

Finally, on May 10, 1950, during the cutdown period that called for teams to trim their rosters from 28 to 25 men, the Dodgers sold Ramsdell's contract to the second-division Cincinnati Reds.

However, his won–lost mark for the struggling team was only 16–29 (.356), and in 1951 he led the National League in games lost (17) and wild pitches (nine).