"He's showing concussion symptoms," Francona said. "He's still a little foggy."
Due to rosters being expanded to a maximum of 40 players in September, the Indians do not have an immediate need to place Aviles on Major League Baseball's seven-day concussion list. That said, Francona made it clear that the Indians are still following the proper protocol for testing Aviles' symptoms each day.
There is currently no timetable for Aviles' return.
"He's going to have to go through that progression," Francona said. "He's been coming into the ballpark, getting checked and then we've actually been sending him home. Depending on how he feels today, that'll [determine] how long he stays."
Aviles, who has hit .245 with five home runs and 33 RBIs in 97 games this season, was initially diagnosed with whiplash after coming up short on the first-inning dive on Monday. Aviles remained in the game for three innings before exiting the game, during which he passed the initial round of concussion tests, according to Francona.
Jordan Bastian is a reporter for MLB.com. Read his blog, Major League Bastian, and follow him on Twitter @MLBastian. This story was not subject to the approval of Major League Baseball or its clubs.