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Welterweight MMA · most active 2000s

Dennis Siver

23–11 · 35 recorded bouts · 2004–2017

MMA record

23–11

Dennis Siver finished 61% of 23 wins inside the distance — the 27th percentile for welterweight MMA, where the median is 73%. No reach is on record, so this page compares record rather than measurements.

20002010win v Kenneth Rosfort-Nees, 2004, kowin v Mohamed Omar, 2004, decisionwin v Kordian Szukala, 2004, submissionloss v Fabricio Nascimento, 2005, submissionwin v Maciej Łuczak, 2005, submissionwin v Dylan van Kooten, 2005, submissionwin v Jim Wallhead, 2006, submissionwin v Said Khalilov, 2006, decisionwin v Paul Jenkins, 2006, submissionloss v Daniel Weichel, 2006, submissionloss v Arni Isaksson, 2006, submissionwin v Adrian Degorski, 2006, submissionwin v Jonas Eriksson, 2006, kowin v Naoyuki Kotani, 2007, koloss v Jess Liaudin, 2007, submissionwin v Chas Jacquier, 2008, submissionloss v Melvin Guillard, 2008, koloss v Gray Maynard, 2008, decisionwin v Paul Kelly, 2009, kowin v Dale Hartt, 2009, submissionwin v Nate Mohr, 2009, kowin v Andre Winner, 2010, submissionwin v Spencer Fisher, 2010, decisionloss v Ross Pearson, 2010, decisionloss v Donald Cerrone, 2011, submissionwin v Matt Wiman, 2011, decisionwin v George Sotiropoulos, 2011, decisionwin v Nam Phan, 2012, decisionwin v Diego Nunes, 2012, decisionnc v Manvel Gamburyan, 2013loss v Cub Swanson, 2013, kowin v Charles Rosa, 2014, decisionloss v Tatsuya Kawajiri, 2015, decisionloss v Conor McGregor, 2015, kowin v B.J. Penn, 2017, decision
WON ABOVE·LOST BELOW BAR = STOPPAGE·BROKEN BAR = SUBMISSION·TICK = DECISION 2004–2017

SOURCE·Dennis Siver — English Wikipedia (CC BY-SA 4.0)·derived figures computed here·REVIEWED 2026-04-27

How this record is compiled

  1. Measurements come from the fighter's English Wikipedia infobox; the bout list is parsed from the results table on the same article, read on 2026-04-27. Boxing tables are read by header name and MMA records by the fixed column order of the MMA record template — two different parsers, because reading MMA rows as a boxing table returns a fighter's boxing record in place of their real one.
  2. A bout enters the ledger with whatever fields the source states: result, opponent, method, round, year. Any field the source leaves empty stays empty here. A date that cannot be established is left blank rather than inferred, and the bout is still counted.
  3. A no contest is counted and printed as a no contest. It is never folded into the wins, the losses or the draws, and it never disappears to make a total balance.
  4. Where the article's infobox total disagrees with its own results table, both figures are published and each is labelled with where it came from. Nothing is averaged and nothing is reconciled against a second database.
  5. Percentiles rank this fighter among the 299 welterweight MMA fighters in the dataset — the most specific group of at least 30 that this fighter belongs to.

Sources, exclusions and known limits →

Bout record

Every bout the article's own results table lists, in order. A dash is a field the source leaves empty — it is not a zero and it is not a guess.

Bout-by-bout recordAUG 2026
YearResultOpponentMethodRd
2017 W B.J. Penn Decision3
2015 L Tatsuya Kawajiri Decision3
2015 L Conor McGregor KO/TKO2
2014 W Charles Rosa Decision3
2013 N Manvel Gamburyan —3
2013 L Cub Swanson KO/TKO3
2012 W Nam Phan Decision3
2012 W Diego Nunes Decision3
2011 L Donald Cerrone Submission1
2011 W Matt Wiman Decision3
2011 W George Sotiropoulos Decision3
2010 W Andre Winner Submission1
2010 W Spencer Fisher Decision3
2010 L Ross Pearson Decision3
2009 W Paul Kelly KO/TKO2
2009 W Dale Hartt Submission1
2009 W Nate Mohr KO/TKO3
2008 W Chas Jacquier Submission1
2008 L Melvin Guillard KO/TKO1
2008 L Gray Maynard Decision3
2007 W Naoyuki Kotani KO/TKO2
2007 L Jess Liaudin Submission1
2006 W Jim Wallhead Submission2
2006 W Said Khalilov Decision3
2006 W Paul Jenkins Submission2
2006 L Daniel Weichel Submission1
2006 L Arni Isaksson Submission2
2006 W Adrian Degorski Submission2
2006 W Jonas Eriksson KO/TKO1
2005 L Fabricio Nascimento Submission1
2005 W Maciej Łuczak Submission2
2005 W Dylan van Kooten Submission1
2004 W Kenneth Rosfort-Nees KO/TKO1
2004 W Mohamed Omar Decision3
2004 W Kordian Szukala Submission1

20 of these opponents have their own page here.

SOURCE·Dennis Siver — English Wikipedia (CC BY-SA 4.0)·derived figures computed here·REVIEWED 2026-04-27

What is on record

Measurements
Reachnot recorded
Heightnot recorded
Stance—
DivisionWelterweight MMA
competed at 3: featherweight, lightweight, welterweight — compared here against the last
Most active decade2000s — 21 of 35 dated bouts
CountryGermany

Wikipedia carries no reach figure for Dennis Siver, so the reach-advantage comparison this site is built on cannot be computed. Everything below comes from the record instead.

2010 win vs Kenneth Rosfort-Nees (2004)win vs Mohamed Omar (2004)win vs Kordian Szukala (2004)loss vs Fabricio Nascimento (2005)win vs Maciej Łuczak (2005)win vs Dylan van Kooten (2005)win vs Jim Wallhead (2006)win vs Said Khalilov (2006)win vs Paul Jenkins (2006)loss vs Daniel Weichel (2006)loss vs Arni Isaksson (2006)win vs Adrian Degorski (2006)win vs Jonas Eriksson (2006)win vs Naoyuki Kotani (2007)loss vs Jess Liaudin (2007)win vs Chas Jacquier (2008)loss vs Melvin Guillard (2008)loss vs Gray Maynard (2008)win vs Paul Kelly (2009)win vs Dale Hartt (2009)win vs Nate Mohr (2009)win vs Andre Winner (2010)win vs Spencer Fisher (2010)loss vs Ross Pearson (2010)loss vs Donald Cerrone (2011)win vs Matt Wiman (2011)win vs George Sotiropoulos (2011)win vs Nam Phan (2012)win vs Diego Nunes (2012)nc vs Manvel Gamburyan (2013)loss vs Cub Swanson (2013)win vs Charles Rosa (2014)loss vs Tatsuya Kawajiri (2015)loss vs Conor McGregor (2015)win vs B.J. Penn (2017)
winlossdraw / NC2004–2017

Record

MMA record

23–11

34 bouts on record

Finish rate

61%

of wins ended inside the distance — welterweight MMA median 73%, 27th percentile

KO/TKO: 5 (22%)Submission: 9 (39%)Decision: 9 (39%)
  • KO/TKO 22%
  • Submission 39%
  • Decision 39%

The career, bout by bout

35 recorded bouts from 2004 to 2017. Every incumbent shows this as a table you have to read; here it is as a shape you can see.

Career span

14y

2004–2017

Longest unbeaten run

5

without a loss — draws do not break it

Busiest year

2006

7 bouts

Recorded bouts

35

35 with a date

Standing questions

What this record does and does not say

What is Dennis Siver's record?
23–11 in MMA. That is the aggregate stated in the English Wikipedia infobox; the results table on the same article lists 35 bouts individually.
Does a no contest change a record here?
No. A no contest is not a win, a loss or a draw, and it is never folded into one. It is counted and printed separately, so a 20–0 record with two no contests is shown as exactly that rather than as 22–0 or as 20–0 with the no contests dropped. The same applies to a bout overturned after the fact where the source records the change.
What happens when sources disagree about a fight?
This site publishes one source — the fighter's English Wikipedia article, read on the date printed under every table — and it does not silently reconcile that against anyone else's database. Where the article's own infobox total and its own results table disagree, both are shown and the page says which one each figure came from. Nothing is averaged, and no field is filled in from a second source to make a total balance.

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Published by

Amit Sharma

Auckland real-estate agent and marketer. Builds free, sourced data tools.