Kershaw (back) threw off flat ground Tuesday inside Chase Field, David Vassegh of AM 570 LA Sports reports.
As Ken Gurnick of MLB.com points out, Kershaw must be feeling well, as he fired long toss the way he does before a start or bullpen session, and then threw from the windup and the stretch while utilizing his full arsenal. It remains to be seen when Kershaw will be able to return to game action, but more information may become available after his throwing session.