The International Olympic Committee said in a statement to the AP it "would not be appropriate" to comment before studying the judgment.
German Olympic leader Thomas Bach said he hoped the Ullrich and Contador verdicts would deter doping.
"It is regrettable that Jan Ullrich didn't take the chance sooner to create clarity himself," Bach, an IOC vice president, said in a statement.
Ullrich's sentence could have been heavier.
CAS rejected the request from cycling governing body to impose a life ban and disqualify all of Ullrich's results since May 2002.
CAS said Ullrich's six-month ban for using amphetamines outside competition in 2002 should not be classed as a doping offense. A second offense can trigger a life ban.
The UCI wanted Ullrich prevented from working again in professional cycling. It had appealed to CAS to challenge a decision by Switzerland's Olympic committee to decline responsibility for prosecuting the former Swiss-based rider.
CAS took jurisdiction for the much-delayed case, and ultimately rendered a damning verdict on cycling's recent history.
Associated Press writer Greg Keller in Paris contributed to this report.
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