Matthias Kessler has been put into an induced coma following surgery Friday, and is said to no longer be in critical condition.
"Matthias Kessler suffered a severe brain trauma. The rider is in serious condition," said a spokesman of the San Dureta Hospital in Palma, Mallorca, according to the SID news agency.
The former T-Mobile and Astana rider crashed while training earlier this week, when a cat ran into his path. It is not known whether he was wearing a helmet.
The 30-year-old was suspended for two years for testosterone doping. His suspension ended last summer, and he had not yet found a new team.