OAKLAND -- Brett Anderson's fifth pitching session since beginning his road back to the A's rotation included the left-hander throwing live batting practice to three batters, Nate Freiman, Stephen Vogt and Chris Young.
Anderson, who last appeared in a game on April 29 and is coming back from a stress fracture in his right foot, threw a pair of 15-pitch innings, and including his warm-up tosses, he threw between 55 and 58 pitches total, said A's manager Bob Melvin.
"It looks like everything went smoothly," Melvin said, adding that Anderson's curveball looked especially crisp. "It would suggest he's kept his arm in great shape."
Melvin also acknowledged that if and when Anderson returns to the big league roster, it's not a guarantee he will be a part of the rotation. Anderson could potentially come out of the bullpen for the playoff push.
"It's an option to do both," Melvin said. "He just wants to get back and help the team any way he can."
Still, Melvin said there is no true timetable on his opening day pitcher and that much will depend upon how Anderson feels Saturday morning after Friday's session.
"We're not dealing with an arm," Melvin said. "We're dealing each and every day with how that foot feels."
Concussed catcher John Jaso, who has been on the 7-day disabled list since July 25, is about to undergo more testing to see how much he has improved after a string of foul tips in Houston last week put him on the D.L.
"I know he's getting better each and every day," Melvin said.
With off days next Monday and Thursday, Melvin is weighing his options about whether to alter his rotation or keep guys on turn. It sounds as if he is leaning toward the latter, to give his pitchers more rest.
"If we stay on turn, that would be six days off for Bartolo (Colon)," Melvin said of his 40-year-old ace, who had a dip in velocity in his start on Wednesday.