- D.C. United (Football)
- D'Mitrius Ballard (Boxing)
- Dagenham & Redbridge (Football)
- Dalbeattie Star (Football)
- Dalian Pro (Football)
- Dalian Yingbo (Football)
- Dalkeith Thistle (Football)
- Dallas Cowboys (American Football)
- Dallas Jackals (Rugby Union)
- Dallas Mavericks (Basketball)
- Dallas Stars (Ice Hockey)
- Dallas Wings (Basketball)
- Dalton Smith (Boxing)
- Damac (Football)
- Dambulla (Cricket)
- Dambulla Aura (Cricket)
- Dambulla Giants (Cricket)
- Dambulla Sixers (Cricket)
- Dambulla Thunders (Cricket)
- Dan Azeez (Boxing)
- Daniel Blenda Dos Santos (Boxing)
- Daniel Cormier (Mixed Martial Arts)
- Daniel Dubois (Boxing)
- Daniel Jacobs (Boxing)
- Daniel Roman (Boxing)
- Daniel Valladares (Boxing)
- Daniele Scardina (Boxing)
- Danila Ramos (Boxing)
- Danny Garcia (Boxing)
- Darkshore (Gaming)
- Darlington (Football)
- Darren Till (Boxing)
- Dartford Women (Football)
- Darvel (Football)
- Darwen Ladies (Football)
- Darwin Hearts FC (Football)
- Darwin Olympic SC (Football)
- DAV College Men (Cricket)
- Dave Allen (Boxing)
- David Avanesyan (Boxing)
- David Benavidez (Boxing)
- David Cuellar (Boxing)
- David Haye (Boxing)
- David Lemieux (Boxing)
- David Light (Boxing)
- David Morrell (Boxing)
- David Nyika (Boxing)
- David Price (Boxing)
- David Stevens (Boxing)
- Davidson (Basketball)
- DAVV University Men (Cricket)
- Dayton (Basketball)
- DC Defenders (American Football)
- De Graafschap (Football)
- Debreceni Vasutas Sport Club (Football)
- Dec Spelman (Boxing)
- Deccan Chargers (Cricket)
- Deccan Gladiators (Cricket)
- Degerfors IF (Football)
- Deji (Boxing)
- Delaware (American Football)
- Delaware (Basketball)
- Delaware State (American Football)
- Delfine Persoon (Boxing)
- Delhi (Cricket)
- Delhi Bulls (Cricket)
- Delhi Capitals (Cricket)
- Delhi Capitals Women (Cricket)
- Delhi Women (Cricket)
- Demetrius Andrade (Boxing)
- Dender (Football)
- Denham United Ladies (Football)
- Denizlispor (Football)
- Denmark (Football)
- Denmark (Tennis)
- Denmark (Ice Hockey)
- Denmark (Handball)
- Denmark (Cricket)
- Denmark Ladies (Football)
- Denmark U19 (Football)
- Denmark U21 (Football)
- Denmark Women (Football)
- Dennis Hogan (Boxing)
- Dennis McCann (Boxing)
- Denver Broncos (American Football)
- Denver Nuggets (Basketball)
- Denys Berinchyk (Boxing)
- Denzel Bentley (Boxing)
- Deontay Wilder (Boxing)
- DePaul (Basketball)
- Deportivo Saprissa (Football)
- Deportivo Toluca F.C. (Football)
- Dera Murad Jamali Region (Cricket)
- Derby County (Football)
- Derby County Ladies (Football)
- Derbyshire (Cricket)
- Derbyshire 2nd XI (Cricket)
- Derbyshire Falcons (Cricket)
- Derbyshire Women (Cricket)
- Derek Chisora (Boxing)
- Derry (Hurling)
- Derry (Gaelic Football)
- Derry City (Football)
- Desert Vipers (Cricket)
- Desna (Football)
- Detroit City FC (Football)
- Detroit Lions (American Football)
- Detroit Pistons (Basketball)
- Detroit Red Wings (Ice Hockey)
- Detroit Tigers (Baseball)
- Deveronvale (Football)
- Devin Haney (Boxing)
- Devon (Cricket)
- Devon Women (Cricket)
- Dewayne Beamon (Boxing)
- Dewsbury Rams (Rugby League)
- Dhaka (Cricket)
- Dhaka Capitals (Cricket)
- Dhaka Division (Cricket)
- Dhaka Leopards (Cricket)
- Dhaka Metropolis (Cricket)
- Dhanmondi Sports Club (Cricket)
- Dhruv Cricket Academy (Cricket)
- Diablos Rojos del Mexico (Baseball)
- Diasqua Little Sai Wan CC Women (Cricket)
- Diasqua Little Sai Wan Cricket Club (Cricket)
- Diasqua Little Sai Wan Cricket Club Women (Cricket)
- Diego Pacheco (Boxing)
- Dijon (Football)
- Dila Gori (Football)
- Dillian Whyte (Boxing)
- Dillon Danis (Boxing)
- Dinamo Batumi (Football)
- Dinamo Brest (Football)
- Dinamo Minsk (Football)
- Dinamo Zagreb (Football)
- Dinamo-Auto (Football)
- Dindigul Dragons (Cricket)
- Dixie State (American Football)
- Djibouti (Football)
- Djurgårdens IF (Football)
- DK Yoo (Boxing)
- Dmitry Bivol (Boxing)
- DMP Durham Sharks (Rugby Union)
- Dolphins (Cricket)
- Dolphins (Rugby League)
- Dolphins (Pakistan) (Cricket)
- Dolphins Women (Cricket)
- Dominic Breazeale (Boxing)
- Dominica (Football)
- Dominican Republic (Tennis)
- Dominican Republic (Basketball)
- Dominican Republic (Football)
- Dominican Republic (Baseball)
- Dominican Republic Women (Volleyball)
- Dominican Republic Women (Football)
- Don Moore (Boxing)
- Donald Cerrone (Mixed Martial Arts)
- Doncaster Knights (Rugby Union)
- Doncaster Rovers (Football)
- Doncaster Rovers Belles (Football)
- Donegal (Hurling)
- Donegal (Gaelic Football)
- Dorking Wanderers (Football)
- Dorking Wanderers Women (Football)
- Dorset (Cricket)
- Dorset Women (Cricket)
- Dover (Football)
- Down (Hurling)
- Down (Gaelic Football)
- DR Congo (Football)
- Dragons (Rugby Union)
- Dragons (Rugby League)
- Dragons Women (Rugby League)
- Drake (Basketball)
- Drexel (Basketball)
- Drita Gjilan (Football)
- Dronfield Town Ladies (Football)
- Drumchapel United (Football)
- Dryburgh Athletic Women (Football)
- Duane Winters (Boxing)
- Dubai (Cricket)
- Dubai Capitals (Cricket)
- Dublin (Hurling)
- Dublin (Gaelic Football)
- Dublin Chiefs (Cricket)
- Duchesses (Cricket)
- Duke (Basketball)
- Duke (American Football)
- Dukla Praha (Football)
- Dulwich Hamlet (Football)
- Dulwich Hamlet Ladies (Football)
- Dumbarton (Football)
- Dunbar United (Football)
- Dundalk (Football)
- Dundee (Football)
- Dundee North End (Football)
- Dundee Stars (Ice Hockey)
- Dundee United (Football)
- Dundee United Women (Football)
- Dundee West Women (Football)
- Dundonald Bluebell (Football)
- Dunfermline Athletic (Football)
- Dunipace (Football)
- Dunton & Broughton United Ladies (Football)
- Duquesne (Basketball)
- Duquesne University (American Football)
- Durban Heat (Cricket)
- Durban Qalandars (Cricket)
- Durban's Super Giants (Cricket)
- Durbar Rajshahi (Cricket)
- Durdanto Dhaka (Cricket)
- Durgapur Dazzlers (Cricket)
- Durham (Cricket)
- Durham 2nd XI (Cricket)
- Durham Cestria Ladies (Football)
- Durham Palatinates (Basketball)
- Durham Women (Football)
- Durham Women (Cricket)
- Dussindale & Hellesdon Women (Football)
- Dustin Poirier (Mixed Martial Arts)
- Dynamo Kiev (Football)
- Dynamo Moscow (Football)
- Dynamo Tbilisi (Football)