- Iceland (Football)
- Iceland (Handball)
- Iceland U21 (Football)
- Iceland Women (Football)
- Idaho (American Football)
- Idaho State (American Football)
- Idaho State (Basketball)
- IDream Tiruppur Tamizhans (Cricket)
- Idris Virgo (Boxing)
- IF Brommapojkarna (Football)
- IF Elfsborg (Football)
- IFK Göteborg (Football)
- IFK Haninge (Football)
- IFK Mariehamn (Football)
- IFK Norrköping (Football)
- IFK Värnamo (Football)
- IK Brage (Football)
- IK Oddevold (Football)
- IK Sirius (Football)
- Ik Yang (Boxing)
- Illawarra Hawks (Basketball)
- Illichivets Mariupol (Football)
- Illinois (American Football)
- Illinois (Basketball)
- Illinois State (American Football)
- Illinois State (Basketball)
- Ilminster Town Ladies (Football)
- Ilunga Makabu (Boxing)
- Ilves (Football)
- Incarnate Word (American Football)
- Incarnate Word (Basketball)
- India (Cricket)
- India (Tennis)
- India (Football)
- India (Hockey)
- India A (Cricket)
- India A Under-19s (Cricket)
- India A Women (Cricket)
- India B (Cricket)
- India B Under-19s (Cricket)
- India B Women (Cricket)
- India C (Cricket)
- India C Women (Cricket)
- India Capitals (Cricket)
- India Champions (Cricket)
- India D (Cricket)
- India D Women (Cricket)
- India Legends (Cricket)
- India Maharajas (Cricket)
- India Masters (Cricket)
- India Under-19s (Cricket)
- India Women (Cricket)
- India Women (Hockey)
- India Women Under-19s (Cricket)
- Indian Board President's Women XI (Cricket)
- Indian Board President's XI (Cricket)
- Indiana (American Football)
- Indiana (Basketball)
- Indiana Fever (Basketball)
- Indiana Pacers (Basketball)
- Indiana State (American Football)
- Indianapolis Colts (American Football)
- Indians (Cricket)
- Indonesia (Football)
- Indonesia (Tennis)
- Indonesia Women (Cricket)
- Indonesia Women Under-19s (Cricket)
- Indore Knights (Cricket)
- Indy Eleven (Football)
- Inter Baku (Football)
- Inter Club D'Escaldes (Football)
- Inter Miami CF (Football)
- Inter Milan (Football)
- Intrasquad Scrimmage (Ice Hockey)
- Inverness Caledonian Thistle Women (Football)
- Inverness CT (Football)
- Inverurie Loco Works (Football)
- Invitational AU & NZ (Rugby Union)
- Iona (Basketball)
- Ionikos (Football)
- Ionut Baluta (Boxing)
- Iowa (Basketball)
- Iowa (American Football)
- Iowa State (American Football)
- Iowa State (Basketball)
- Ipswich Basketball Women (Basketball)
- Ipswich Town (Football)
- Ipswich Town FC Women (Football)
- Iran (Football)
- Iran (Basketball)
- Iran (Volleyball)
- Iran (Handball)
- Iraq (Football)
- Ireland (Cricket)
- Ireland (Rugby Union)
- Ireland (Rugby League)
- Ireland (Tennis)
- Ireland (Hockey)
- Ireland A (Cricket)
- Ireland A (Rugby Union)
- Ireland Emerging Players (Cricket)
- Ireland U20 (Rugby Union)
- Ireland Under-19s (Cricket)
- Ireland Women (Cricket)
- Ireland Women (Rugby Union)
- Ireland Women (Lacrosse)
- Ireland Women (Hockey)
- Ireland Women Under-19s (Cricket)
- Irvine Meadow XI (Football)
- Isaac Dogboe (Boxing)
- Islamabad Region (Cricket)
- Islamabad United (Cricket)
- Isle of Man (Netball)
- Isle of Man Women (Cricket)
- Ismael Barroso (Boxing)
- Israel (Football)
- Israel (Tennis)
- Israel (Basketball)
- Israel (Baseball)
- Israel Adesanya (Mixed Martial Arts)
- Israel U20 (Football)
- Israel U21 (Football)
- Israel Women (Football)
- Israel Women (Lacrosse)
- Israil Madrimov (Boxing)
- Istanbul Başakşehir (Football)
- Isuzu Southern Kings (Rugby Union)
- Italian Select XV (Rugby Union)
- Italy (Rugby Union)
- Italy (Football)
- Italy (Ice Hockey)
- Italy (Tennis)
- Italy (Basketball)
- Italy (Rugby League)
- Italy (Cricket)
- Italy (Volleyball)
- Italy (Baseball)
- Italy Ladies (Football)
- Italy U19 (Football)
- Italy U20 (Rugby Union)
- Italy U20 (Football)
- Italy U21 (Football)
- Italy Women (Rugby Union)
- Italy Women (Lacrosse)
- Italy Women (Football)
- Italy Women (Volleyball)
- Italy Women (Cricket)
- Italy Women (Basketball)
- IUPUI (Basketball)
- Ivan Baranchyk (Boxing)
- Ivan Nikolov (Boxing)
- Ivan Redkach (Boxing)
- Ivan Zucco (Boxing)
- Ivana Habazin (Boxing)
- Ivory Coast (Football)
- Ivory Coast (Basketball)
- Ivory Coast (Tennis)