On April 26, 1996, a 33-year-old Johnny De La Rosa (39-6, 24 KOs) and Roberto Sierra met in the ring.
De La Rosa came in to the fight on a 1-fight losing streak with a 53% KO rate, and was fighting after a gap of 1 year, 1 month, and 1 day.
Johnny De La Rosa lost to Roberto Sierra via points decision in the 6-round fight, and adds a loss to his record at 39-7.
On March 25, 1995, a 32-year-old Johnny De La Rosa (39-5, 24 KOs) and Isander Lacen met in the ring.
De La Rosa came in to the fight on a 1-fight win streak with a 54% KO rate, and was fighting after a gap of 9 months and 26 days.
Johnny De La Rosa lost to Isander Lacen via points decision in the 8-round fight, and adds a loss to his record at 39-6.
On March 27, 1992, a 29-year-old Johnny De La Rosa (38-4, 24 KOs) and a 26-year-old Mexican boxer Jorge Paez (39-4-4, 27 KOs) met in the ring.
De La Rosa came in to the fight on a 2-fight win streak with a 57% KO rate, and was fighting after a gap of 5 months and 2 days. Páez was on a 1-fight win streak with a 57% KO rate, and fighting after a layoff of 1 month and 10 days.
Jorge Páez defeated Johnny De La Rosa via unanimous decision in the 10-round fight. Páez improves his record to 40-4-4, while De La Rosa adds a loss to his record at 38-5.
On April 13, 1989, a 26-year-old Johnny De La Rosa (36-3, 24 KOs) and Tunde Foster met in the ring in a lightweight bout.
De La Rosa came in to the fight on a 2-fight win streak with a 61% KO rate, and was fighting after a gap of 1 year and 19 days.
Johnny De La Rosa lost to Tunde Foster via TKO in the 10th round, and adds a loss to his record at 36-4.
On October 25, 1987, a 24-year-old Johnny De La Rosa (34-2, 24 KOs) got a shot at the super-featherweight IBF title held by 28-year-old American boxer Rocky Lockridge (41-5, 34 KOs).
De La Rosa came in to the fight on a 10-fight win streak with a 66% KO rate, and was fighting after a gap of 2 months and 11 days. Lockridge was on a 3-fight win streak with a 73% KO rate, and fighting after a layoff of 2 months and 16 days.
Rick Lockridge stopped Johnny De La Rosa via TKO in the 10th round of the 15-round world-title fight, and successfully defended his IBF super-featherweight title. Lockridge improves his record to 42-5 (35 KOs), while De La Rosa adds a loss to his record at 34-3.
On May 4, 1985, a 22-year-old Johnny De La Rosa (24-1, 17 KOs) and Antonio Esparragoza met in the ring.
De La Rosa came in to the fight on a 3-fight win streak with a 68% KO rate, and was fighting after a gap of 10 months and 11 days.
Johnny De La Rosa lost to Antonio Esparragoza via TKO in the 3rd round, and adds a loss to his record at 24-2.
On June 25, 1983, a 20-year-old Johnny De La Rosa (21-0, 16 KOs) got a shot at the featherweight WBC title held by 23-year-old Puerto Rican boxer Juan Laporte (23-3, 13 KOs).
De La Rosa came in to the fight on a 21-fight win streak with a 76% KO rate, and was fighting after a gap of 7 months and 6 days. Laporte was on a 4-fight win streak with a 50% KO rate, and fighting after a layoff of 4 months and 5 days.
Juan Laporte defeated Johnny De La Rosa via split decision and successfully defended his WBC featherweight title. Laporte improves his record to 24-3, while De La Rosa adds a loss to his record at 21-1.