| IWA World Junior Heavyweight Championship |
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| Promotion | International Wrestling Association |
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| Date established | 1999 |
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| Date retired | 2006 |
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- Unified World Junior Heavyweight Championship
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| Most reigns | Blitz (8 reigns) |
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| Longest reign | Mr. Águila (264 days) |
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| Shortest reign | Andrés Borges (<1 day) |
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The IWA World Junior Heavyweight Championship was a title for wrestlers that weight 225 pounds and under that was being defended in the International Wrestling Association in Puerto Rico. The championship is generally contested in professional wrestling matches, in which participants execute scripted finishes rather than contend in direct competition.