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1. Podracing
2. Blob Racing
3. Huttball (the Warzone area in SWTOR of the same name appears to be an actual deathsport)
4. Geonosian gladiator fighting
5. Geonosian executions (appear to be for sport, so I think it should count).
6. Lightsaber sporting tournaments (see Yoda: Dark Rendezvous, where Yoda and some other Masters preside over a dueling tourney.)
There are a few others I can't remember the names of, like the droid football-like sport seen on the TVs in the bar in Episode II, or the hang-gliding racing game that Anakin played in Rogue Planet.
Total: 6
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It was the year of fire… the year of destruction… the year we took back what was ours.
It was the year of rebirth… the year of great sadness… the year of pain… and the year of joy.
It was a new age. It was the end of history. It was the year everything changed.
The year is 2261.
The place: Babylon 5.