Bush was arrested after police said he struck a motorcyclist in a hit-and-run accident in Port Charlotte, Fla., while driving under the influence Thursday, the Tampa Bay Times reported.
The victim in the crash, Tony Tufano, 72, was in critical condition at a Fort Myers hospital, where he was put into a medically induced coma Monday.
Bush was being held in Charlotte County jail on more than $1 million bail, The Tampa Tribune reported Tuesday.
Guyer's agent, Jamie Appel, said Guyer had loaned Bush his Dodge Durango to drop Guyer off at the team's Port Charlotte facility, then return to an apartment where the two players are roommates. Appel said Guyer didn't give Bush permission to drive the vehicle anywhere else.
Police said Bush fled after the accident and his blood-alcohol level was 0.18, more than twice the level considered impaired in Florida.
Appel said Guyer's sport utility vehicle was seized as evidence and he had cooperated in the investigation.
The Times said Guyer, who declined to comment, could face a civil lawsuit because he owns the vehicle.