Allen wuxuu iibsaday kooxda Portland Trail Blazers ee NBA sanadkii 1988 isagoo ka iibsaday shirkada guryaha ee California Larry Weinberg lacag dhan $70 million. Wuxuu kaalin muhiim ah ka qaatay horumarinta iyo maalgelinta Moda Center (oo horey loogu yaqaanay Rose Garden), oo ah garoonka ay Blazers ku ciyaaraan. Wuxuu iibsaday garoonka 2dii Abriil 2007, wuxuuna sheegay in tani ay ahayd guul weyn iyo tallaabo wanaagsan oo loogu talagalay xayeysiinta. Allen-owned Trail Blazers waxay gaareen playoffs 19 jeer oo ay ku jiraan NBA Finals 1990 iyo 1992.
Sanadkii 1988