Bobby Chacon has seven losses against six opponents on his boxing record. For a list of Chacon's best fights, refer to "Best fights of Bobby Chacon".
On January 14, 1984 Bobby Chacon fought Ray Mancini in a lightweight world-title fight for Mancini's WBA title. Chacon was 32 years old and with a record of 52-7-1 (42), and Mancini was 22 years old and with a record of 28-1 (22). Chacon lost the fight via 3rd-round TKO.
On May 30, 1981 Bobby Chacon fought Cornelius Boza Edwards in a super-featherweight world-title fight for Edwards' WBC title. Chacon was 29 years old and with a record of 45-6-1 (38). Chacon lost the fight via 13th-round retirement.
On November 16, 1979 Bobby Chacon fought Alexis Argüello in a super-featherweight world-title fight for Argüello's WBC title. Chacon was 27 years old and with a record of 42-5-1 (36), and Argüello was 27 years old and with a record of 59-5 (49). Chacon lost the fight via 7th-round retirement.
On November 15, 1977 Bobby Chacon faced off against Arturo Leon at age 25. He was coming in with a record of 37-4 (33). Chacon lost the fight via 10-round split decision.
On December 7, 1975 Bobby Chacon faced off against Rafael Limón at age 24. He was coming in with a record of 27-3 (25). Chacon lost the fight via 10-round unanimous decision.
On June 20, 1975 Bobby Chacon met Rubén Olivares in a featherweight (WBC) world-title defense fight. Chacon was 23 years old and with a record of 26-2 (24), and Olivares was 28 years old and with a record of 79-5-1 (71). Chacon lost the fight via 2nd-round TKO and lost the title.
On June 23, 1973 Bobby Chacon faced off against Rubén Olivares in a featherweight bout at age 21. He was coming in with a record of 19-1 (17), and Olivares was 26 years old and with a record of 71-3-1 (65). Chacon lost the fight via 9th-round retirement.