Hendriks (elbow) tossed two innings in a rehab appearance with Triple-A Nashville on Thursday.
Hendriks has thrown four times since beginning a rehab assignment June 7, and he has allowed two earned runs over 5.2 innings (3.18 ERA) while compiling a 4:2 K:BB. He is working as a reliever, so it should not be long before he is ready to rejoin the A's.