Apr 9, 2009

• The Rio Grande Valley Vipers claimed Thomas Sanders from the player pool.
  
• The Cleveland Cavaliers called up Jawad Williams from the Rio Grande Valley Vipers.
  

Apr 8, 2009

• The Rio Grande Valley Vipers claimed Rashid Byrd from the player pool.
  

Apr 6, 2009

• The Rio Grande Valley Vipers placed Stanley Asumnu on waivers due to injury.
  

Apr 4, 2009

• The Rio Grande Valley Vipers re-aquired Marcus Hubbard from injury.
  
• The Rio Grande Valley Vipers placed Quin Humphrey on waivers due to injury.
  

Mar 29, 2009

• The Rio Grande Valley Vipers claimed Cliff Clinkscales from the player pool.
  
• The Rio Grande Valley Vipers placed Jeff Trepagnier on waivers.
  

Mar 18, 2009

• The Rio Grande Valley Vipers claimed Julian Sensley from the player pool.
  

Mar 17, 2009

• The Rio Grande Valley Vipers placed Marcus Hubbard on waivers due to injury.
  

Mar 4, 2009

• The Rio Grande Valley Vipers re-aquired Alpha Bangura from injury.
  
• The Rio Grande Valley Vipers sent Alpha Bangura in a trade to the Bakersfield Jam.
  
• The Rio Grande Valley Vipers placed Maurice Carter on waivers.
  
• Jeff Trepagnier was acquired in a trade by the Rio Grande Valley Vipers from the Bakersfield Jam.
  

Feb 18, 2009

• The Rio Grande Valley Vipers placed Kendall Dartez on waivers due to injury.
  
• The Rio Grande Valley Vipers re-aquired Jared Jordan from injury.
  

Feb 14, 2009

• The Rio Grande Valley Vipers placed Alpha Bangura on waivers due to injury.
  
• The Rio Grande Valley Vipers claimed Jawad Williams from the player pool.
  

Jan 26, 2009

• Kendall Dartez returned to the Rio Grande Valley Vipers.
  
• The Rio Grande Valley Vipers placed Jared Jordan on waivers due to injury.
  

Jan 20, 2009

• The Rio Grande Valley Vipers claimed Tierre Brown from the player pool.
  
• The Rio Grande Valley Vipers sent Tierre Brown in a trade to the Idaho Stampede.
  
• Ernest Scott was acquired in a trade by the Rio Grande Valley Vipers from the Idaho Stampede.
  

Jan 16, 2009

• Alton Ford terminated his contract with the Rio Grande Valley Vipers early.
  

Jan 14, 2009

• The Rio Grande Valley Vipers claimed Maurice Carter from the player pool.
  

Jan 9, 2009

• The Houston Rockets recalled Joey Dorsey from assignment with the Rio Grande Valley Vipers.
  

Jan 8, 2009

• Smush Parker terminated his contract with the Rio Grande Valley Vipers early.
  

Jan 4, 2009

• The Rio Grande Valley Vipers claimed Marcus Hubbard from the player pool.
  

Dec 29, 2008

• Kendall Dartez terminated his contract with the Rio Grande Valley Vipers early.
  

Dec 26, 2008

• The Houston Rockets assigned Joey Dorsey to the Rio Grande Valley Vipers.
  

Dec 17, 2008

• The Rio Grande Valley Vipers claimed Jared Jordan from the player pool.
  
• The Rio Grande Valley Vipers placed Keoni Watson on waivers.
  

Dec 3, 2008

• The Rio Grande Valley Vipers re-aquired Alpha Bangura from injury.
  
• The Rio Grande Valley Vipers placed Delonte Holland on waivers due to injury.
  

Nov 26, 2008

• The Rio Grande Valley Vipers placed Damone Morris on waivers.
  
• The Rio Grande Valley Vipers placed Thomas Sanders on waivers.
  

Nov 20, 2008

• The Rio Grande Valley Vipers placed Alpha Bangura on waivers due to injury.
  
• The Rio Grande Valley Vipers placed Jeffrey Day on waivers.
  
• The Rio Grande Valley Vipers placed J.R. Harrison on waivers.
  
• The Rio Grande Valley Vipers placed Boomer Herndon on waivers.
  
• The Rio Grande Valley Vipers placed Lance Perique on waivers.
  

Nov 7, 2008 - The 2008-2009 NBA Development League Annual Draft took place.

• The Rio Grande Valley Vipers selected Alpha Bangura in Round 4 with Pick 5 in the 2008 Annual NBA Development League Draft.
  
• The Rio Grande Valley Vipers selected Jeffrey Day in Round 7 with Pick 12 in the 2008 Annual NBA Development League Draft.
  
• The Rio Grande Valley Vipers selected J.R. Harrison in Round 10 with Pick 5 in the 2008 Annual NBA Development League Draft.
  
• The Rio Grande Valley Vipers selected Boomer Herndon in Round 6 with Pick 5 in the 2008 Annual NBA Development League Draft.
  
• The Rio Grande Valley Vipers selected Delonte Holland in Round 2 with Pick 5 in the 2008 Annual NBA Development League Draft.
  
• The Rio Grande Valley Vipers selected Kurt Looby in Round 3 with Pick 12 in the 2008 Annual NBA Development League Draft.
  
• The Rio Grande Valley Vipers selected Smush Parker in Round 1 with Pick 12 in the 2008 Annual NBA Development League Draft.
  
• The Rio Grande Valley Vipers selected Lance Perique in Round 8 with Pick 5 in the 2008 Annual NBA Development League Draft.
  
• The Rio Grande Valley Vipers selected Thomas Sanders in Round 5 with Pick 12 in the 2008 Annual NBA Development League Draft.
  
• The Rio Grande Valley Vipers selected Keoni Watson in Round 9 with Pick 12 in the 2008 Annual NBA Development League Draft.
  

Oct 1, 2008

• Stanley Asumnu returned to the Rio Grande Valley Vipers.
  
• Kendall Dartez was allocated to the Rio Grande Valley Vipers
  
• Alton Ford was allocated to the Rio Grande Valley Vipers
  
• Quin Humphrey returned to the Rio Grande Valley Vipers.
  
• Damone Morris tried out with the Rio Grande Valley Vipers.
  
• Trent Strickland returned to the Rio Grande Valley Vipers.
  
• Craig Winder returned to the Rio Grande Valley Vipers.