BALTIMORE (AP) Athletics pitcher Sonny Gray could return from a nagging back injury as soon as Monday.

The right-hander was scratched from his scheduled start against Toronto on Thursday after experiencing back spasms Wednesday.

Trainers treated him with muscle relaxants and a massage. On Thursday, he reported no pain after throwing for five minutes from 75 feet.

More from FoxSports

Before the A's faced the Orioles on Friday, Gray said, ''Thankfully it's really kind of progressing better and better. I threw, and it really couldn't have went any better.''

Gray is 12-4 with a 2.06 ERA.

Oakland manager Bob Melvin said Gray will throw a bullpen session Saturday, and has ruled out the possibility of the disabled list.

Melvin says, ''If everything feels good, then we'll pick a date for him. The earliest would be Monday.''