On November 10, 1980, a 17-year-old Johnny De La Rosa (3-0, 0 KOs) and Ruben Dario Herasme met in the ring for the 2nd time,.
De La Rosa came in to the fight on a 3-fight win streak with a 0% KO rate, and was fighting after a gap of 21 days.
In the rematch, Johnny De La Rosa stopped Ruben Dario Herasme via TKO in the 3rd round. De La Rosa improves his record to 4-0 (1 KO)
On April 17, 1986, a 23-year-old Johnny De La Rosa (30-2, 22 KOs) and Adriano Arreola met in the ring in a super-featherweight bout.
De La Rosa came in to the fight on a 6-fight win streak with a 68% KO rate, and was fighting after a gap of 1 month and 20 days.
Johnny De La Rosa stopped Adriano Arreola via TKO in the 7th round. De La Rosa improves his record to 31-2 (23 KOs)
On August 14, 1987, a 24-year-old Johnny De La Rosa (33-2, 23 KOs) and Sebastian Wilburn met in the ring.
De La Rosa came in to the fight on a 9-fight win streak with a 65% KO rate, and was fighting after a gap of 8 months and 25 days.
Johnny De La Rosa stopped Sebastian Wilburn via TKO in the 1st round. De La Rosa improves his record to 34-2 (24 KOs)
On January 22, 1982, a 19-year-old Johnny De La Rosa (10-0, 7 KOs) and Terry Pizzaro met in the ring.
De La Rosa came in to the fight on a 10-fight win streak with a 70% KO rate, and was fighting after a gap of 1 month and 4 days.
Johnny De La Rosa stopped Terry Pizzaro via TKO in the 1st round. De La Rosa improves his record to 11-0 (8 KOs)
On February 28, 1986, a 23-year-old Johnny De La Rosa (29-2, 21 KOs) and Daniel Felizardo met in the ring.
De La Rosa came in to the fight on a 5-fight win streak with a 67% KO rate, and was fighting after a gap of 2 months and 15 days.
Johnny De La Rosa stopped Daniel Felizardo via KO in the 1st round. De La Rosa improves his record to 30-2 (22 KOs)
On June 21, 1985, a 22-year-old Johnny De La Rosa (24-2, 17 KOs) and Carlos Albuerne met in the ring.
De La Rosa came in to the fight on a 1-fight losing streak with a 65% KO rate, and was fighting after a gap of 1 month and 17 days.
Johnny De La Rosa stopped Carlos Albuerne via KO in the 1st round. De La Rosa improves his record to 25-2 (18 KOs)
On May 15, 1984, a 21-year-old Johnny De La Rosa (22-1, 16 KOs) and Isidoro Medina met in the ring.
De La Rosa came in to the fight on a 1-fight win streak with a 69% KO rate, and was fighting after a gap of 7 months.
Johnny De La Rosa stopped Isidoro Medina via KO in the 1st round. De La Rosa improves his record to 23-1 (17 KOs)
On October 31, 1982, a 19-year-old Johnny De La Rosa (19-0, 14 KOs) and William Whipple met in the ring.
De La Rosa came in to the fight on a 19-fight win streak with a 73% KO rate, and was fighting after a gap of 29 days.
Johnny De La Rosa stopped William Whipple via KO in the 1st round. De La Rosa improves his record to 20-0 (15 KOs)
On August 26, 1981, an 18-year-old Johnny De La Rosa (6-0, 3 KOs) and Salvador Cosme met in the ring.
De La Rosa came in to the fight on a 6-fight win streak with a 50% KO rate, and was fighting after a gap of 4 months and 30 days.
Johnny De La Rosa stopped Salvador Cosme via KO in the 1st round. De La Rosa improves his record to 7-0 (4 KOs)
On February 12, 1981, an 18-year-old Johnny De La Rosa (4-0, 1 KO) and Antonio Rodriguez met in the ring.
De La Rosa came in to the fight on a 4-fight win streak with a 25% KO rate, and was fighting after a gap of 3 months and 2 days.
Johnny De La Rosa stopped Antonio Rodriguez via KO in the 1st round. De La Rosa improves his record to 5-0 (2 KOs)