Before finishing his career in December 1950 orthodox boxer Jeffra built up a record of 94 wins, 7 draws, and 20 losses, starting at age 18 on September 1933 and ending 17 years later at . Jeffra's longest win streak is 24 fights between September 1933 and December 1937. His longest KO streak in his 122 fights is 5 fights long.
Showing his superior boxing ability in an impressive debut, Jeffra picked up the win against Earl Wise and became only one of 3 people to have taken him the full 4 round distance. Following on from his debut, Jeffra continued his mostly successful career by fighting in a further 62 fights. In this time he fought Indian Quintana, Joey Temes and Ruby Bradley to name just a few, fighting 8 times in 1933, 8 times in 1934 and 45 times between 1935 and 1939 in this period.
Jeffra lost to Danny London in his next fight. Taking place on October 21st, 1935, Jeffra's career record after this fight stood at 25-1-1. Jeffra faced the first defeat of his career against Danny London in the 5th round of a 8 round fight via TKO. Jeffra then went on to win a further 49 fights taking his record to 67 wins, 7 losses and 1 draw.
On April 29th, 1941, Jeffra went into action again and beat Al Brown taking the winning record to 68 wins. Becoming the first person to stop Al Brown, Jeffra beat Brown via TKO in the 7th round of a 10 round fight.
On March 30th, 1942, Jeffra was in action again with a win via TKO against Sonny Brentz taking his mostly successful record to 76-10-2. The 8 round fight ended in the 2nd round via TKO crowning Jeffra as only the 2nd to stop Brentz in his career. Fights against boxers Frankie Rubino followed taking his record to 77-11-2
Taking a knock to his career, Jeffra fought and was defeated by Chalky Wright on June 19th, 1942 taking his record to 77-12-2. Jeffra's fight against Chalky Wright was Jeffra's 2nd stoppage defeat which came via TKO in the 10th round of the fight.
Jeffra went into his next career fight with a record of 93-18-7 and took this to 94 wins with a win against Leslie Harris on February 3rd, 1947. Harris was a great challenge for Jeffra, losing over the full 10 round distance and crowning Jeffra as the 5th person to have defeated Harris.
Jeffra's next defeat of his career came against Packy Mcfarland on December 12th, 1950. This was a challenging final career fight for Jeffra, Jeffra was taken the full 10 rounds in a PTS loss. Jeffra's career ended in a records of 94 wins,20 losses, and 7 draws.