Here is a list of Williams's best fights. For a list of Williams's losses, refer to "Paul Williams Losses".
On July 14, 2007 Paul Williams fought Antonio Margarito in a welterweight world-title fight for Margarito's WBO title. Williams was 25 years old and with a record of 33-0 (24), and Margarito was 29 years old and with a record of 34-4 (24). Williams won the fight via 12-round unanimous decision and is crowned the new welterweight world champion.
On April 11, 2009 Paul Williams faced off against Winky Wright at age 27. He was coming in with a record of 37-1 (27), and Wright was 37 years old and with a record of 51-4-1 (25). Williams won the fight via 12-round unanimous decision.
On February 18, 2012 Paul Williams faced off against Nobuhiro Ishida at age 30. He was coming in with a record of 41-2 (27), and Ishida was 36 years old and with a record of 24-6-2 (9). Williams won the fight via 12-round unanimous decision.
On June 7, 2008 Paul Williams fought Carlos Quintana in a welterweight world-title fight for Quintana's WBO title. Williams was 26 years old and with a record of 34-1 (25), and Quintana was 31 years old and with a record of 25-1 (19). Williams stopped Carlos Quintana via 1st-round TKO and is crowned the new welterweight world champion.
On August 19, 2006 Paul Williams faced off against Sharmba Mitchell in a welterweight bout at age 25. He was coming in with a record of 31-0 (23), and Mitchell was 35 years old and with a record of 57-5 (30). Williams stopped Sharmba Mitchell via KO.
On December 5, 2009 Paul Williams faced off against Sergio Martínez at age 28. He was coming in with a record of 38-1 (27), and Martínez was 34 years old and with a record of 44-1-2 (24). Williams won the fight via 12-round majority decision.
On July 9, 2011 Paul Williams faced off against Erislandy Lara at age 29. He was coming in with a record of 40-2 (27), and Lara was 28 years old and with a record of 15-0-1 (10). Williams won the fight via 12-round majority decision.