Before finishing his career in August 1947 orthodox boxer Servo built up a record of 47 wins, 2 draws, and 4 losses, starting at age 18 on August 1938 and ending 8 years later at . He started his best winning streak on August 1938 however, this came to an end on October 1939. In this period he won a total of 27 fights.
In his debut fight, Servo's became only the 4th fighter to go the distance with Jerry Hall, winning by PTS in round 6 of 6. Following his debut, Servo had an impressive start to his career as he went on to win his next 27 fights including 7 times in 1938 and 20 times in 1939 against the likes of George Salamone, Monty Pignatore and Bobby Ivy.
Servo lost to Sugar ray Robinson in his next fight. Taking place on September 25th, 1941, Servo's career record after this fight stood at 42-1-2. Taking the first setback of his career, the September 25th, 1941 Robinson defeat went the full distance and ended via UD. Servo continued his success in the next 4 fights taking his record to 45 wins, 2 losses and 2 draws.
Keeping his losses at 2, Servo fought on February 1st, 1946 beating Freddie Cochrane via KO. This took his record to 46-2-2 showing quite the successful career to date. Servo was the 5th person to stop Freddie and he did it in the 4th round via KO. The fight was due to last 15 rounds.
Servo's career took a knock with a loss against Rocky Graziano on March 29th, 1946 taking his record to 46-3-2. Taking a huge blow to Servo's confidence, Graziano proved to be too much and stopped Servo early, becoming the first person to defeat Servo via stoppage.
Servo entered his next fight with a mostly successful record of 46-3-2 and took this to 47 wins with a win against Benny Singleton on July 21st, 1947 via KO. The win happened in the 2nd round of a 10 round fight via KO.
Servo's next defeat of his career came against Joe Dimartino on August 5th, 1947. This proved to be one fight too many for Servo's career, Dimartino was the victor becoming only the 2nd person to stop Servo. KO in the 1st. Servo decided to call it a day after this fight.