| | Event type

100 metres Butterfly, Men

Date	30 July 1984
Status	Olympic
Location	Olympic Swim Stadium, University of Southern California, Los Angeles, California
Participants	53 from 39 countries

The top 100 butterflyer in 1982-83 had been the United States’ Matt Gribble. After winning the 1982 World Championships, he had set the world record of 53.44 in 1983 and bettered 54 seconds six times, the only swimmer in the world to break that barrier. He made the US team but placed second at the Olympic Trials to Pablo Morales, who broke the world record in winning, recording 53.38. But Gribble was injured in Los Angeles, having hurt his back, and his coach commented, “The Trials was a miracle swim for him. He hadn’t done any sprint work and not yardage since his injury. He was swimming off his background.” Gribble would sadly fail to qualify for the Olympic final.

But Michael Groß was so good at the Olympics that he likely may have won even facing a top-notch Gribble. The day before this race he had won the 200 freestyle in world record time. Morales was ahead at the wall in 24.76, ahead of his world record pace, and had ½-a-bodylength on Groß. But he gradually closed the gap and regained the lead 10 metres from the wall, outtouching Morales in 53.08, another world record, as Morales was also under the old standard, with 53.23. The final was fast, very fast, as every swimmer except eighth-place finisher Bengt Baron (SWE), the 1980 Olympic champ in the 100 back, recorded a personal best and a national record.

Pos	Number	Competitor	NOC	R1	B Final	Final
1	196	Michael Groß	FRG	54.02 (1 h6)	–	53.08 (1)	Gold
2	476	Pablo Morales	USA	53.78 (1 h7)	–	53.23 (2)	Silver
3	12	Glenn Buchanan	AUS	54.86 (1 h1)	–	53.85 (3)	Bronze
4	497	Rafael Vidal	VEN	54.33 (1 h2)	–	54.27 (4)
5	228	Andy Jameson	GBR	54.59 (1 h4)	–	54.28 (5)
6	–	Anthony Mosse	NZL	55.19 (2 h7)	–	54.93 (6)
7	189	Andreas Behrend	FRG	55.22 (1 h3)	–	54.95 (7)
8	–	Bengt Baron	SWE	54.67 (1 h5)	–	55.14 (8)
9	96	Tom Ponting	CAN	55.23 (2 h4)	55.31 (1)	–
10	418	Théophile David	SUI	55.81 (3 h6)	55.40 (2)	–
11	420	Dano Halsall	SUI	55.35 (2 h1)	55.51 (3)	–
=12	162	David López-Zubero	ESP	55.66 (3 h1)	55.61 (=4)	–
=12	251	Kristofer Stivenson	GRE	55.46 (2 h3)	55.61 (=4)	–
14	281	Cees Vervoorn	NED	55.46 (3 h5)	55.75 (6)	–
15	137	Søren Østberg	DEN	55.73 (2 h6)	56.04 (7)	–
16	462	Matt Gribble	USA	55.39 (2 h5)	–	–		1
17	33	Mark Stockwell	AUS	55.70 (3 h7)	–	–		2
18	323	Fabrizio Rampazzo	ITA	55.70 (2 h2)	– (DNS)	–
19	78	Dave Churchill	CAN	55.84 (4 h7)	–	–
20	161	Harri Garmendia	ESP	55.97 (3 h2)	–	–
21	518	Anthony Nesty	SUR	56.15 (3 h3)	–	–
22	347	Taihei Saka	JPN	56.40 (3 h4)	–	–
23	222	Ian Collins	GBR	56.41 (4 h6)	–	–
24	–	Shudo Kawawa	JPN	56.52 (4 h5)	–	–
25	266	Gérard de Kort	NED	56.55 (4 h3)	–	–
26	446	İhsan Sabri Özün	TUR	56.55 (4 h1)	–	–
27	133	Zheng Jian	CHN	56.58 (5 h6)	–	–
28	409	Ang Peng Siong	SGP	56.61 (4 h4)	–	–
=29	–	Filiberto Colón	PUR	56.66 (5 h3)	–	–
=29	499	Hrvoje Barić	YUG	56.70 (4 h2)	–	–
31	5	Luis Juncos	ARG	56.86 (5 h7)	–	–
32	449	Carlos Scanavino	URU	57.46 (6 h7)	–	–
33	378	Carlos Romo	MEX	57.61 (6 h6)	–	–
34	329	Allan Marsh	JAM	57.69 (5 h4)	–	–
35	146	Ahmed Said	EGY	57.71 (5 h5)	–	–
36	447	Kemal Sadri Özün	TUR	57.75 (6 h5)	–	–
=37	402	João Santos	POR	58.17 (6 h4)	–	–
=37	260	Tsang Yi Ming	HKG	58.25 (5 h1)	–	–
39	44	Sean Nottage	BAH	58.73 (5 h2)	–	–
40	357	Bang Jun-Yeong	KOR	58.91 (6 h3)	–	–
41	140	Ahmed Ibrahim	EGY	58.95 (6 h2)	–	–
42	328	Deryck Marks	JAM	1:00.57 (6 h1)	–	–
43	288	Ingi Jónsson	ISL	1:00.68 (7 h7)	–	–
44	519	Faisal Marzouk	KUW	1:02.00 (7 h3)	–	–
45	254	Roberto Granados	GUA	1:02.32 (7 h6)	–	–
46	148	Juan Miranda	ESA	1:04.33 (7 h5)	–	–
47	368	Ibrahim El-Baba	LBN	1:04.48 (7 h4)	–	–
48	361	Adel Al-Ghaith	KUW	1:04.62 (7 h1)	–	–
49	174	Warren Sorby	FIJ	1:05.53 (8 h5)	–	–
50	282	Salvador Covelo	HON	1:05.91 (8 h4)	–	–
51	436	Trevor Ncala	SWZ	1:06.94 (8 h7)	–	–
52	175	Samuela Tupou	FIJ	1:07.75 (7 h2)	–	–
53	71	Esa Fadel	BRN	1:13.27 (8 h6)	–	–

Round One

Date	30 July 1984 — 8:30
Format	Fastest eight advanced to the final. Places 9-16 advanced to the B Final.

Pos	Lane	Competitor	NOC	Time
1	–	Pablo Morales	USA	53.78	QOR
2	–	Michael Groß	FRG	54.02	QOR
3	–	Rafael Vidal	VEN	54.33	Q
4	–	Andy Jameson	GBR	54.59	Q
5	–	Bengt Baron	SWE	54.67	Q
6	–	Glenn Buchanan	AUS	54.86	Q
7	–	Anthony Mosse	NZL	55.19	Q
8	–	Andreas Behrend	FRG	55.22	Q
9	–	Tom Ponting	CAN	55.23	q
10	–	Dano Halsall	SUI	55.35	q
11	–	Matt Gribble	USA	55.39	q
=12	–	Kristofer Stivenson	GRE	55.46	q
=12	–	Cees Vervoorn	NED	55.46	q
14	–	David López-Zubero	ESP	55.66	q
=15	–	Fabrizio Rampazzo	ITA	55.70	q
=15	–	Mark Stockwell	AUS	55.70	q
17	–	Søren Østberg	DEN	55.73
18	–	Théophile David	SUI	55.81
19	–	Dave Churchill	CAN	55.84
20	–	Harri Garmendia	ESP	55.97
21	–	Anthony Nesty	SUR	56.15
22	–	Taihei Saka	JPN	56.40
23	–	Ian Collins	GBR	56.41
24	–	Shudo Kawawa	JPN	56.52
=25	–	İhsan Sabri Özün	TUR	56.55
=25	–	Gérard de Kort	NED	56.55
27	–	Zheng Jian	CHN	56.58
28	–	Ang Peng Siong	SGP	56.61
29	–	Filiberto Colón	PUR	56.66
30	–	Hrvoje Barić	YUG	56.70
31	–	Luis Juncos	ARG	56.86
32	–	Carlos Scanavino	URU	57.46
33	–	Carlos Romo	MEX	57.61
34	–	Allan Marsh	JAM	57.69
35	–	Ahmed Said	EGY	57.71
36	–	Kemal Sadri Özün	TUR	57.75
37	–	João Santos	POR	58.17
38	–	Tsang Yi Ming	HKG	58.25
39	–	Sean Nottage	BAH	58.73
40	–	Bang Jun-Yeong	KOR	58.91
41	–	Ahmed Ibrahim	EGY	58.95
42	–	Deryck Marks	JAM	1:00.57
43	–	Ingi Jónsson	ISL	1:00.68
44	–	Faisal Marzouk	KUW	1:02.00
45	–	Roberto Granados	GUA	1:02.32
46	–	Juan Miranda	ESA	1:04.33
47	–	Ibrahim El-Baba	LBN	1:04.48
48	–	Adel Al-Ghaith	KUW	1:04.62
49	–	Warren Sorby	FIJ	1:05.53
50	–	Salvador Covelo	HON	1:05.91
51	–	Trevor Ncala	SWZ	1:06.94
52	–	Samuela Tupou	FIJ	1:07.75
53	–	Esa Fadel	BRN	1:13.27

Heat #1

Pos	Lane	Competitor	NOC	Time	50 m	50-100 m Time (Rank)
1	–	Glenn Buchanan	AUS	54.86	25.82 (=2)	29.04 (1)	Q
2	–	Dano Halsall	SUI	55.35	25.56 (1)	29.79 (3)	q
3	–	David López-Zubero	ESP	55.66	25.82 (=2)	29.84 (4)	q
4	–	İhsan Sabri Özün	TUR	56.55	26.77 (4)	29.78 (2)
5	–	Tsang Yi Ming	HKG	58.25	27.49 (5)	30.76 (5)
6	–	Deryck Marks	JAM	1:00.57	27.70 (6)	32.87 (6)
7	–	Adel Al-Ghaith	KUW	1:04.62	29.52 (7)	35.10 (7)

Heat #2

Pos	Lane	Competitor	NOC	Time	50 m	50-100 m Time (Rank)
1	–	Rafael Vidal	VEN	54.33	26.05 (1)	28.28 (1)	Q
2	–	Fabrizio Rampazzo	ITA	55.70	26.27 (2)	29.43 (3)	q
3	–	Harri Garmendia	ESP	55.97	26.87 (4)	29.10 (2)
4	–	Hrvoje Barić	YUG	56.70	26.52 (3)	30.18 (4)
5	–	Sean Nottage	BAH	58.73	27.72 (6)	31.01 (5)
6	–	Ahmed Ibrahim	EGY	58.95	27.58 (5)	31.37 (6)
7	–	Samuela Tupou	FIJ	1:07.75	30.70 (7)	37.05 (7)

Heat #3

Pos	Lane	Competitor	NOC	Time	50 m	50-100 m Time (Rank)
1	–	Andreas Behrend	FRG	55.22	25.75 (1)	29.47 (3)	Q
2	–	Kristofer Stivenson	GRE	55.46	26.20 (2)	29.26 (1)	q
3	–	Anthony Nesty	SUR	56.15	26.84 (4)	29.31 (2)
4	–	Gérard de Kort	NED	56.55	26.57 (3)	29.98 (5)
5	–	Filiberto Colón	PUR	56.66	26.89 (5)	29.77 (4)
6	–	Bang Jun-Yeong	KOR	58.91	27.80 (6)	31.11 (6)
7	–	Faisal Marzouk	KUW	1:02.00	28.90 (7)	33.10 (7)

Heat #4

Pos	Lane	Competitor	NOC	Time	50 m	50-100 m Time (Rank)
1	–	Andy Jameson	GBR	54.59	25.97 (1)	28.62 (1)	Q
2	–	Tom Ponting	CAN	55.23	26.59 (3)	28.64 (2)	q
3	–	Taihei Saka	JPN	56.40	26.75 (4)	29.65 (3)
4	–	Ang Peng Siong	SGP	56.61	26.06 (2)	30.55 (4)
5	–	Allan Marsh	JAM	57.69	27.04 (5)	30.65 (5)
6	–	João Santos	POR	58.17	27.31 (6)	30.86 (6)
7	–	Ibrahim El-Baba	LBN	1:04.48	29.61 (8)	34.87 (7)
8	–	Salvador Covelo	HON	1:05.91	29.31 (7)	36.60 (8)

Heat #5

Pos	Lane	Competitor	NOC	Time	50 m	50-100 m Time (Rank)
1	–	Bengt Baron	SWE	54.67	25.54 (1)	29.13 (1)	Q
2	–	Matt Gribble	USA	55.39	25.89 (3)	29.50 (2)	q
3	–	Cees Vervoorn	NED	55.46	25.76 (2)	29.70 (3)	q
4	–	Shudo Kawawa	JPN	56.52	26.80 (5)	29.72 (4)
5	–	Ahmed Said	EGY	57.71	26.96 (6)	30.75 (5)
6	–	Kemal Sadri Özün	TUR	57.75	26.57 (4)	31.18 (6)
7	–	Juan Miranda	ESA	1:04.33	29.29 (8)	35.04 (7)
8	–	Warren Sorby	FIJ	1:05.53	28.88 (7)	36.65 (8)

Heat #6

Pos	Lane	Competitor	NOC	Time	50 m	50-100 m Time (Rank)
1	–	Michael Groß	FRG	54.02	25.42 (1)	28.60 (1)	QOR
2	–	Søren Østberg	DEN	55.73	25.94 (2)	29.79 (4)
3	–	Théophile David	SUI	55.81	26.16 (3)	29.65 (2)
4	–	Ian Collins	GBR	56.41	26.29 (4)	30.12 (5)
5	–	Zheng Jian	CHN	56.58	26.85 (6)	29.73 (3)
6	–	Carlos Romo	MEX	57.61	26.77 (5)	30.84 (6)
7	–	Roberto Granados	GUA	1:02.32	29.13 (7)	33.19 (7)
8	–	Esa Fadel	BRN	1:13.27	32.82 (8)	40.45 (8)

Heat #7

Pos	Lane	Competitor	NOC	Time	50 m	50-100 m Time (Rank)
1	–	Pablo Morales	USA	53.78	25.21 (1)	28.57 (1)	QOR
2	–	Anthony Mosse	NZL	55.19	26.23 (3)	28.96 (2)	Q
3	–	Mark Stockwell	AUS	55.70	25.95 (2)	29.75 (4)	q
4	–	Dave Churchill	CAN	55.84	26.36 (4)	29.48 (3)
5	–	Luis Juncos	ARG	56.86	26.58 (5)	30.28 (5)
6	–	Carlos Scanavino	URU	57.46	27.03 (6)	30.43 (6)
7	–	Ingi Jónsson	ISL	1:00.68	28.51 (7)	32.17 (7)
8	–	Trevor Ncala	SWZ	1:06.94	30.07 (8)	36.87 (8)

B Final

Date	30 July 1984 — 16:20

Pos	Lane	Competitor	NOC	Time	50 m	50-100 m Time (Rank)
1	–	Tom Ponting	CAN	55.31	26.64 (6)	28.67 (1)
2	–	Théophile David	SUI	55.40	26.24 (4)	29.16 (=2)
3	–	Dano Halsall	SUI	55.51	25.93 (1)	29.58 (5)
=4	–	David López-Zubero	ESP	55.61	26.45 (5)	29.16 (=2)
=4	–	Kristofer Stivenson	GRE	55.61	25.94 (=2)	29.67 (6)
6	–	Cees Vervoorn	NED	55.75	25.94 (=2)	29.81 (7)
7	–	Søren Østberg	DEN	56.04	26.65 (7)	29.39 (4)
DNS	–	Fabrizio Rampazzo	ITA	–	– (–)	–

Final Round

Date	30 July 1984 — 16:15

Pos	Lane	Competitor	NOC	Time	50 m	50-100 m Time (Rank)
1	–	Michael Groß	FRG	53.08	24.77 (2)	28.31 (2)	WR
2	–	Pablo Morales	USA	53.23	24.76 (1)	28.47 (3)
3	–	Glenn Buchanan	AUS	53.85	25.33 (3)	28.52 (4)
4	–	Rafael Vidal	VEN	54.27	25.98 (6)	28.29 (1)
5	–	Andy Jameson	GBR	54.28	25.58 (5)	28.70 (6)
6	–	Anthony Mosse	NZL	54.93	26.35 (8)	28.58 (5)
7	–	Andreas Behrend	FRG	54.95	25.38 (4)	29.57 (8)
8	–	Bengt Baron	SWE	55.14	25.99 (7)	29.15 (7)