Lawlar (hamstring) will begin a rehab assignment with Double-A Amarillo on Tuesday, Jack Sommers of SI.com reports.
Lawlar will play back-to-back rehab games Tuesday and Wednesday before the Diamondbacks determine the next steps for the outfielder. Considering Lawlar has been sidelined since late June with a strained right hamstring, he is likely to require a handful of rehab contests before being reinstated.