Gallen (hamstring) could start Saturday against Oakland if Thursday's bullpen session goes well, Alex Weiner of Arizona Sports reports.
Advice: Thursday's bullpen session will be the second one thrown by Gallen, who also has a couple of simulated games under his belt since he landed on the injured list. The right-hander hasn't thrown in game conditions since May 30, when he threw just six pitches against the Mets before being removed due to the hamstring strain.
Rotowire.com
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