Dionicio Cerón Pizarro (born October 9, 1965 in Toluca) is a former marathon runner from Mexico, whose personal best in the classic distance was 2:08:30. He represented his native country two times at the Summer Olympics: in 1992 and 1996. He also won the London Marathon three consecutive times between 1994 and 1996, the only man to have ever achieved this feat. Eliud Kipchoge, António Pinto and Martin Lel are the only other men to have won it three times or more, however not in consecutive years.

Year	Competition	Venue	Position	Event	Notes
Representing  Mexico
1990	Chicago Marathon	Chicago, United States	9th	Marathon	2:12:18
	Central American and Caribbean Games	Mexico City, Mexico	1st	10,000 m	29:46.09
1991	Rotterdam Marathon	Rotterdam, Netherlands	2nd	Marathon	2:10:02
1992	Olympic Games	Barcelona, Spain	—	Marathon	DNF
	Beppu-Ōita Marathon	Beppu-Ōita, Japan	1st	Marathon	2:08:36
	Fukuoka Marathon	Fukuoka, Japan	4th	Marathon	2:10:42
1993	Rotterdam Marathon	Rotterdam, Netherlands	1st	Marathon	2:11:06
	Central American and Caribbean Games	Ponce, Puerto Rico	1st	10,000 m	28:58.11
	Fukuoka Marathon	Fukuoka, Japan	1st	Marathon	2:08:51
1994	London Marathon	London, United Kingdom	1st	Marathon	2:08:53
	Fukuoka Marathon	Fukuoka, Japan	16th	Marathon	2:15:23
1995	London Marathon	London, United Kingdom	1st	Marathon	2:08:30
	World Championships	Gothenburg, Sweden	2nd	Marathon	2:12:13
1996	London Marathon	London, United Kingdom	1st	Marathon	2:10:00
1997	Boston Marathon	Boston, United States	3rd	Marathon	2:10:59
	New York City Marathon	New York City, United States	8th	Marathon	2:13:01
2000	Hokkaido Marathon	Sapporo, Japan	1st	Marathon	2:17:14

• Evans, Hilary; Gjerde, Arild; Heijmans, Jeroen; Mallon, Bill; et al. "Dionicio Cerón". Olympics at Sports-Reference.com. Sports Reference LLC. Archived from the original on 2010-05-01.

• Dionicio Cerón at World Athletics

Records
Preceded by Mark Curp	Men's Half Marathon World Record Holder 16 September 1990 – 3 April 1993	Succeeded by Moses Tanui