Rockies pitcher Jordan Lyles began a rehab assignment with Class A Modesto Saturday, giving up three hits and two walks in 3 2/3 scoreless innings and striking out four batters.

Lyles has been out since June 4 while recovering from a fractured hand. He is expected to make his return to the majors August 5 provided he remains healthy. Lyles owns a 3.52 ERA and 49:26 K:BB ratio in 69 innings.