Steele (elbow) will throw from flat ground and then toss 20 pitches off a mound Saturday, Tony Andracki of Marquee Sports Network reports.
Steele has been sidelined all season, first as he continued his recovery from UCL revision surgery and later after suffering a flexor strain in April. The left-hander will not have enough time to get stretched out as a starting pitcher this season, but a return late in the year as a reliever is possible.