|7/31/01||Scott Linebrink: Scott Linebrink, RHP, was optioned to Triple-A New Orleans.|
|Scott Elarton: Scott Elarton, RHP, and a player to be named later were traded to the Colorado Rockies in exchange for Pedro Astacio and cash considerations.|
|Tony McKnight: Tony McKnight, RHP, was traded to the Pittsburgh Pirates in exchange for Mike Williams, RHP.|
|7/28/01||Scott Linebrink: Scott Linebrink, RHP, was recalled from Triple-A New Orleans.|
|Tony McKnight: Tony McKnight, RHP, was optioned to Triple-A New Orleans.|
|Jim Mann: Jim Mann, RHP, was optioned to Triple-A New Orleans.|
|Tony McKnight: Tony McKnight, RHP, was recalled from Triple-A New Orleans.|
|7/17/01||Jim Mann: The Astros purchased the contract of Jim Mann, RHP, from Triple-A New Orleans.|
|Scott Elarton: Scott Elarton, RHP, was placed on the 15-day DL with biceps tendinitis|
|7/9/01||Charlie Hayes: The Astros requested waivers on Charlie Hayes for the purpose of giving the infielder his unconditional release.|
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