Walker (finger) will begin a rehab assignment with Double-A Reading on Wednesday, Matt Gelb of The Athletic reports.
Walker has been sidelined since late June with a blister and inflammation in his right index finger, but he's finally ready to test things out in a game setting. The right-hander could potentially be ready to return next week if things go well Wednesday, although with the amount of time he's missed, it's possible he'll be asked to make an additional rehab start.