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UFC 44:
(9/26/03) Diaz made his UFC debut against
Jeremy Jackson by defeating him with an armbar at 2:04 in the First
Round.
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UFC 47:
(4/2/04) Diaz defeated Robbie Lawler by KO at
1:31 in the Second Round.
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UFC 49:
(8/21/04) Diaz lost to
Karo Parisyan by split decision
at the end of the Third Round.
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UFC 51:
(2/5/05) Diaz defeated Drew Fickett by TKO
(Strikes) at 4:40 of the First Round.
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UFC 53:
(6/4/05) Diaz defeated Koji Oishi by KO at
1:24 of the First Round.
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The Ultimate Fighter 2 Finale: (11/05/05)
Diaz lost to Diego Sanchez by
unanimous decision at the end the Third Round.
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UFC 57:
(2/4/06) Diaz lost to
Joe Riggs by unanimous decision at
the end of the Third Round.
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UFC 59:
(4/15/06) Diaz lost to
Sean Sherk by unanimous decision at
the end of the Third Round.
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UFC 62:
(8/26/06) Diaz defeated Josh Neer by
Submission at 1:42 in the Third Round.
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UFC 65: (11/18/06) Diaz defeated Graison Tibau
by TKO at 2:27 in the Second Round.